Malicious PDF — malware analysis report

Static analysis result for SHA-256 974b1001966d387d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 17:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f1ad44f83c96c2d37d0ae0111cef1d7 SHA-1: ac59810bd46f726ba9b88a4f5c4966d91a7ab2bc SHA-256: 974b1001966d387da4ce24da12a10dcb33d0f612bb5579ef72f7b1dbf1fd5c62
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself is largely garbled but contains the same Portuguese phrase as the redirector URL, suggesting a lure. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, and another heuristic identifies it as a link farm.

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.com/pify?keyword=fun%25C3%25A7%25C3%25A3o+das+celulas+caliciformes+no+intestino In PDF document text
    • http://zofenek.tdcwebstercity.com/uploads/1/3/0/8/130873995/eeeba5f.pdfIn PDF document text
    • http://files.chikuawali.org/uploads/1/3/1/1/131163780/03023.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/1/0433/9548/1754/files/insert_footer_into_excel_spreadsheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/centurylink_router_settings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/problems_of_reliability_and_validity_in_ethnographic_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/xufetizezoxedafuxas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/dipafawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/5389096169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/86267006248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/debupiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0228/8537/files/50248503978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7321/5387/files/the_butterfly_effect_2_hd.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 5624 bytes
SHA-256: 9b0df35f2df02006ba9cdefc9cb322228cd3eab016262dda64e6e7f43d50b674
font_01_sfnt_off00006d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 11724 bytes
SHA-256: cbcb9ab07340b1dd66f8dd009d287d344d719df8477c0f2bccb9944c9ee89fd1

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