Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a0fab7618a1e61…

MALICIOUS

PDF

48.1 KB Created: 2020-08-04 01:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 897403aab262a8559b2d37878af3702b SHA-1: a8bfe9e06e2cb63bbba5886a801858d400707660 SHA-256: 37a0fab7618a1e61493717a25000ab884ee50110fb0661bfe723cb923943f5a0
194 Risk Score

Malware Insights

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

The PDF contains numerous links, masquerading as a legitimate document, to a redirector service. The primary link, 'https://ttraff.cc/pify?keyword=catholic+encyclopedia+vol+4+pdf', is flagged as malicious. The document body is heavily obfuscated, but the presence of the malicious redirector and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

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.cc/pify?keyword=catholic+encyclopedia+vol+4+pdf In PDF document text
    • http://files.myweeklygrind.com/uploads/1/3/2/7/132741194/6411580.pdfIn PDF document text
    • http://sogoke.flagstaffscies.org/uploads/1/3/1/0/131071252/kumanomaloseja.pdfIn PDF document text
    • http://files.gospelblue.org/uploads/1/3/2/6/132681772/dofufafabasudib-juxanak-tivimelenu.pdfIn PDF document text
    • http://files.spotsyhighbands.com/uploads/1/3/2/6/132681392/wulujiranux_fesabuwukum_jukesa.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/1/0429/8424/3351/files/mukovivodaluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9460/5975/files/gumozerunevewepago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/teropexuxon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1585/4490/files/gukivilusolowarijiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/1964457743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/fitapepesodimozesezuparo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/80451916249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/github_branch_naming_convention.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B4 5032 bytes
SHA-256: 4f19a4afd348c8fcc22ff9f5e3765b92be632c3ce7424a1e2e8653fd0ea1c26a
font_01_sfnt_off000082e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E4 9980 bytes
SHA-256: 36a7142a75a2793c9d7935bc242b6f1acc3cc1bd8bc2ac4d32bd18da78ff48ba
font_02_sfnt_off0000a50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA50C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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