Malicious PDF — malware analysis report

Static analysis result for SHA-256 01401ba908f07042…

MALICIOUS

PDF

55.3 KB Created: 2020-08-11 19:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f009aa7e5aec8818f495151659e8cfdd SHA-1: f1c91987ce6450eb3d79be63ba53a9fb605455d5 SHA-256: 01401ba908f07042f790d83435c48e271a88ee918dfc018ddbfb7d3c2261e52c
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a biology textbook. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the same malicious URL and other PDF links, suggesting a link farm designed to distribute malware or phish users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=grade+11+cbse+biology+textbook+pdf
    • http://files.loftconversionsderby.co.uk/uploads/1/3/1/8/131856039/dolijaxinivavaz-dubumonogadu-buxujogo-netuwamijukuna.pdf
    • http://zilatono.nicholasperryclark.com/uploads/1/3/0/8/130874284/jejik_xawebizewemudig_gibetite_xuxototomu.pdf
    • http://files.cozipawz.com/uploads/1/3/2/7/132712530/ritirumiruw.pdf
    • http://files.illinoismep.com/uploads/1/3/0/7/130740490/wumipujivu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/como_superar_la_ansiedad_social.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/lupena.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4178/files/dotuzotipagasunudiruxujol.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/zexunimuwulewu.pdf
    • https://cdn.shopify.com/s/files/1/0441/1555/8552/files/distress_tolerance_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/todapamafuxupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/lemexawekerijugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/the_light_between_oceans_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/43593162883.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/vaxivosisinabuj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d62.bin
fbf24d50ae0044050a1ac45b453fdea86af2663479c53e53af3294d87ccda7d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D62 5780 bytes
font_01_sfnt_off0000a139.bin
8130994cbb88a7a377434d731e3e586da21c9778c3d81c6ea9401acc6e89816d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA139 10156 bytes
font_02_sfnt_off0000c42a.bin
eed8c166a09d16a8216fa18e30a2b89bb0cf88ad71b7a26520e3a2b5b34f21ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC42A 3060 bytes

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