Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab78e52ef5ca8eb…

MALICIOUS

PDF

52.1 KB Created: 2020-08-09 15:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97e2de3d71a0ebcdfd9a1dc885222981 SHA-1: a12ba345f3ae54edb6d6ac909736110190e61c92 SHA-256: bab78e52ef5ca8eb02aa7fe3969adda3deeb06d9eb4d5e8b00c54146dcdf252c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content. The document body contains garbled text but also includes the malicious URL, suggesting an attempt to disguise its true nature.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=benitos+menu+pdf In PDF document text
    • http://files.awesomevoices.net/uploads/1/3/1/3/131384432/256ac832b.pdfIn PDF document text
    • http://files.dmserra.com/uploads/1/3/1/4/131437689/1299118bffb6.pdfIn PDF document text
    • http://files.outstandinglibrarian.org/uploads/1/3/1/6/131636914/gazugus_zugokezinu_bapegusonulog.pdfIn PDF document text
    • http://files.kristofferto.com/uploads/1/3/2/7/132710624/5af45f21d37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/24046677574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/rock_forming_minerals_in_thin_section.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/c_string_to_lowercase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9559/4910/files/cecelia_ahern_the_gift_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/41020526143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1083/9960/files/definition_of_birth_asphyxia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/jubomifedorupilikomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/zufawilanujixiwazuzeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/lemuzaxataveru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/24670637051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/19202469661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/sigebis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56666804065.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 4780 bytes
SHA-256: 641c07c46b786ef4be9a28d8ec2a487d6266846e083184f4fd68ca4023354656
font_01_sfnt_off000071b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B4 14316 bytes
SHA-256: ea03abf602cf80682997aa1f95307c7a9c6e11728fed33b6887ecd6ef278c4ce
font_02_sfnt_off00009ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECF 16420 bytes
SHA-256: e8cb11c66b9da036f5046388ecc2467d4131a8070a5cdd0d583845b767b493fe
font_03_sfnt_off0000b51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f