Malicious PDF — malware analysis report

Static analysis result for SHA-256 1951dc7181e528c0…

MALICIOUS

PDF

55.3 KB Created: 2020-08-10 14:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ece105549fd356b49af24c09b192dee SHA-1: 67f5ac070e9e7e29e5d7794cab68a3259f0f7bbb SHA-256: 1951dc7181e528c007e4d233f0c0947e7a64f1548c61495146ce386a9a8ba845
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=multi+attribute+utility+theory+pdf', suggesting a phishing or scam lure. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=multi+attribute+utility+theory+pdf In PDF document text
    • http://files.bellavistadreams.com/uploads/1/3/1/6/131636644/b8d0f0252080537.pdfIn PDF document text
    • http://wurox.mwdcoach.com/uploads/1/3/0/7/130775162/5255b4260.pdfIn PDF document text
    • http://files.bluegreenandredconstruction.com/uploads/1/3/1/4/131454916/7ea00f6a2.pdfIn PDF document text
    • http://files.studioambiguous.com/uploads/1/3/1/3/131382274/voriganezudeku.pdfIn PDF document text
    • http://files.potterosaproperties.com/uploads/1/3/2/6/132696304/zisisofob_sisazodidateg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/60726710385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/lesson_plan_in_english_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/65126393787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/business_benefits_of_cloud_computing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/proxy_site_com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/accounting_in_tally.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/figemetuvawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/convert_to_editable_word_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/30363518630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/the_adventures_of_tom_sawyer_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/2006_jeep_liberty_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7554 5196 bytes
SHA-256: f3daf21666e4b49ba21d2eda7ca9b6c5b20041ac7177e6e40485e133a1686d74
font_01_sfnt_off0000870b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870B 16404 bytes
SHA-256: f20e33295b578f6f03c85b8052f3ccd6fbaebd4ccfba6e529645ed2dfb756797
font_02_sfnt_off0000ba5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5A 16280 bytes
SHA-256: c686324b5df50fe48128460f0dbc89142d33ec892d66cbc153f9ac9b2e8c6047