Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4142199ff21068d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-21 23:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac9f50905c96db3b58f20676f8cc4592 SHA-1: 488588dc86c6a7da8e5d65d168bab1f3a517cfbc SHA-256: a4142199ff21068dd99c315588770ec3b08501fb83ace3d8d9892658224ad8de
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the string "https://ttraff.ru/pify?keyword=chat+for+pc+free", suggesting a lure for users to visit this malicious site. The presence of a large number of external PDF links further supports the classification as a link farm, likely used for SEO manipulation or to distribute malicious content.

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=chat+for+pc+free In PDF document text
    • http://vuzelu.catalog.koehlerscale.com/uploads/1/3/0/9/130969352/9370216.pdfIn PDF document text
    • http://files.christineprietoarted.com/uploads/1/3/0/8/130874339/1010004.pdfIn PDF document text
    • http://files.wilsonhypnotherapy.com/uploads/1/3/1/0/131070230/76bde89cc2c9e.pdfIn PDF document text
    • http://files.everythingruralchurch.com/uploads/1/3/2/6/132680874/84c91298ad8d9ee.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/1/0431/6905/4886/files/70313331682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/mysql_turn_off_safe_mode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8289/8839/files/52477300221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/blank_durable_power_of_attorney_form_georgia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/surah_ar_rahman_latin_dan_arab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/5918767911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3980/9959/files/bezususen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77650869017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/44916068069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6124/files/2056377211.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 8

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_off000065c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 4552 bytes
SHA-256: e6d3bf093ed58541f469857b58d405ac9bd35ac34db0e1b381e2b58f895d65b7
font_01_sfnt_off00007554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7554 10120 bytes
SHA-256: dfc1b44704a243b0e44deed767aec5fe4fdfec69dca79807954432e6a53e523b
font_02_sfnt_off00009808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9808 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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