Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc8665d98133626…

MALICIOUS

PDF

47.2 KB Created: 2020-08-24 22:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4bf5ef03106889ffa9e213fd52a2a35 SHA-1: a14e36ab8443e009b0355eaae5d7ad7baecf1863 SHA-256: adc8665d9813362670c0dc874ffa18a152f4c526b8392eb360c202c6d2121109
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=google+chromium+os++iso', is a known redirector. This suggests the document's purpose is to lure users through a chain of redirects to a malicious destination. No scripts were extracted, and the document body was heavily obfuscated, but the link farm heuristic and the malicious redirector link are strong indicators of malicious intent.

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=google+chromium+os++iso In PDF document text
    • http://files.sungsulim.com/uploads/1/3/2/6/132683080/4244463.pdfIn PDF document text
    • http://files.en.guacamaya.info/uploads/1/3/1/3/131383657/vulexufenolibu.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/1/0435/9864/3363/files/povonomidebap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/85376120332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/10000_days_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/1344/7336/files/40328298020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/write_in_logarithmic_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/dnd_5e_genasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/1743020417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8644/6746/files/disarufofenakime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/veterinary_microbiology_and_microbial_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/12040006239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5218/7298/files/nitrogen_cycle_file.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7F 4732 bytes
SHA-256: 5a4cb9c1674d3145e5bb4f03dd8458214fa69252e7ffbacc1275d8f7cb4bd3dd
font_01_sfnt_off00007f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F91 9944 bytes
SHA-256: a605fdee338131e8e08e616a5abccff5ab525f0df788b409c19a1057b6a6cd73
font_02_sfnt_off0000a19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA19A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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