Malicious PDF — malware analysis report

Static analysis result for SHA-256 1578582fa9fccac6…

MALICIOUS

PDF

41.8 KB Created: 2020-08-03 11:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 335971a068c7fe0f96d8da5dd33c283a SHA-1: 66de0fd03659e0aeb4c2892c37f8acd7505bbf37 SHA-256: 1578582fa9fccac606f8455dca31bbc42f7fffe424a26a48840777774fdee8b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to surveys and includes this malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic.

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.com/pify?keyword=types+of+cadastral+survey+pdf
    • http://files.diamonddashmealprep.com/uploads/1/3/0/7/130775784/a709d74b95606.pdf
    • http://files.daddybabygirl.com/uploads/1/3/2/7/132740413/tamuvipuxezon.pdf
    • http://files.shcdesignsllc.com/uploads/1/3/1/3/131398385/tazopekatefuvoxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/93474539347.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/62804478228.pdf
    • https://cdn.shopify.com/s/files/1/0437/1087/3765/files/savazem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/13962670405.pdf
    • https://cdn.shopify.com/s/files/1/0440/0647/3886/files/sivorepokojoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/dmv_accident_report_oregon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/sabovimejojen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/jixavagejunofivof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/14637323197.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/ranebigunexebibipugemigu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/pofinatojilokejuzok.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6160/files/62240086332.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9162/files/sejilixojoditawakomogutik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006706.bin
0652c622c60ac89201499aab06147e3753e6012f6520ba0f8b71d49d152250bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 5260 bytes
font_01_sfnt_off00007909.bin
c874167f4a5ed3d85506ad195b1ec9debca3f5cfb2bb24a90d95efc1906f95d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7909 9680 bytes

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