Malicious PDF — malware analysis report

Static analysis result for SHA-256 df513d8fc47aa396…

MALICIOUS

PDF

107.0 KB Created: 2020-08-08 19:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b837e54261f97b644b5eef9ef89f18d2 SHA-1: 502100fd384ca3c1c1f43b1951ed90b1e0b3f990 SHA-256: df513d8fc47aa396c4d6e640af2437b3571751d54b0d17f77686d1af54160daa
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a redirector link to 'ttraff.cc' and a PDF link farm. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to malicious content, likely for phishing or malware delivery. The presence of numerous external PDF links also points to a link farm strategy.

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=la+bobina+de+tesla+pdf In PDF document text
    • http://files.graceandtaylor.com.au/uploads/1/3/1/8/131871526/66889.pdfIn PDF document text
    • http://files.deborahlawrenceschafer.com/uploads/1/3/2/6/132695511/3777644.pdfIn PDF document text
    • http://files.karmafitness.net/uploads/1/3/1/3/131380177/9850397.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/1/0434/9755/4084/files/48173490568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1932/0992/files/raised_eyebrow_emoticon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/albertine_sarrazin_astragal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/wow_classic_larval_acid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/calendario_serie_a_tim_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/24910431698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1713/2456/files/the_legend_of_zelda_ocarina_of_time_3ds_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/44072264476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/kupinulugomovimezesufido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/84865628930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/xazatuxerawutax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2777/4115/files/25678365056.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D9C 5020 bytes
SHA-256: 827fe93a411fa96913239bfba281070aa0fa3ae6b8c26f54e56d256cd20f110d
font_01_sfnt_off00016ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EC2 15424 bytes
SHA-256: e1a6bf8daf9963bda0942736514d59f940ff88df371739357569cab4717871b4