Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c822a43823ae79…

MALICIOUS

PDF

60.4 KB Created: 2020-08-24 10:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95a494037b02fbd39d2f5bb4291332f6 SHA-1: 4aa5a83634e3c462668700359a3fc264dd37f670 SHA-256: 53c822a43823ae796490ac474897a5ee10b1ad35e5fa134a456706c4850159c5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=caducidade+de+contrato+por+reforma'. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=caducidade+de+contrato+por+reforma
    • http://gumaba.falconintegratedsystems.com/uploads/1/3/1/6/131606346/9446082.pdf
    • http://files.mycccamp.com/uploads/1/3/0/7/130776123/2472859.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/bebexubafim.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/45517044450.pdf
    • https://cdn.shopify.com/s/files/1/0446/5885/1993/files/wow_classic_bis_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/transtorno_de_ansiedade_generalizada_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/64028981754.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5637/files/94500136519.pdf
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/dynamics_of_machinery_class_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/nafigowumapuwapopafanij.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/mulixudiwewaxune.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/top_100_interview_questions_and_answers_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/pepaxibilitiwopufivom.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/rewuxaxotakotan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2580/0087/files/html_form_method_example.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abb8.bin
975da8fc9dd0fb45edeef06f3a4c91c82b903b97d5b362ee16da7db85ac55f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB8 4996 bytes
font_01_sfnt_off0000bc99.bin
2fa4bb39a9568452ac81d4f2e59aaa262c80ce31941db9730b8dc874479c267b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC99 12848 bytes

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