Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf770e188309ba2…

MALICIOUS

PDF

60.9 KB Created: 2020-08-23 01:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8140d2dbd5736f4d03146324a0e0b23 SHA-1: 4d05629c67d3625d29c48163df6306d94a75be6b SHA-256: 1cf770e188309ba25763d7117beb26665c4d50204070dde4b92a110666cb23d8
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users with keywords like 'maps for minecraft apk'. The document body, though heavily obfuscated, contains the same lure and the redirector URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be a phishing lure disguised as a software download.

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=maps+for+minecraft++apk In PDF document text
    • http://files.brainreachnorth.ca/uploads/1/3/0/9/130969755/tuzepazaxen.pdfIn PDF document text
    • http://files.guillome.nl/uploads/1/3/1/4/131453432/memedimaka.pdfIn PDF document text
    • http://davaligo.hda.com/uploads/1/3/0/7/130740592/wanivubuwosijewalej.pdfIn PDF document text
    • http://files.mauricioes.com/uploads/1/3/0/9/130969061/830691.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/1/0430/0511/6575/files/ccs811_sensor_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/98179200722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/44850711910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/43380909418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4126/6587/files/destination_b1_with_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/49140959008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3806/5319/files/75275976072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/definition_of_economic_efficiency.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/39311224911.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
🗂 Part of campaign: 7tucker.com 4 samples

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_off0000a383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA383 4988 bytes
SHA-256: b3f476768f22466a22d5de7650ee1803ed58d5f8fdc8285e6392712d31bbea1d
font_01_sfnt_off0000b45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB45A 10476 bytes
SHA-256: 859835de8f718ed4e8698241215e749aa09c2db0b0b25e623b6d8c8e0688c881
font_02_sfnt_off0000d833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD833 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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