Malicious PDF — malware analysis report

Static analysis result for SHA-256 106fa01bdccf1b42…

MALICIOUS

PDF

69.1 KB Created: 2020-08-07 07:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d85c3977032e9a249a388d247bdd0fbb SHA-1: ea3a68b37eb601e0191bb6f8cb81cd4bdea47010 SHA-256: 106fa01bdccf1b42db3568d3bd583fa950d2a61e6c9ec32cf106d14587d85040
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely as part of a phishing or scam campaign.

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=seasonal+affective+disorder+pdf
    • http://files.englishmastiffrescue.net/uploads/1/3/2/7/132710683/08836c08.pdf
    • http://files.stedbigrednation.com/uploads/1/3/2/7/132740606/6891004.pdf
    • http://files.classicwindowsandsiding.com/uploads/1/3/2/8/132814024/sufutiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/satofekefekuwozavobijogut.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/bowditch_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/6307/4213/files/neguduvezadedibubivugaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/xojepopemaboj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/16620786425.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/duwap.pdf
    • https://cdn.shopify.com/s/files/1/0436/7712/2713/files/mizijetofodisodizudonega.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29426312843.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9669/files/71169988670.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/8245454694.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/takedinuvejipususukagugit.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/11227564796.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/rawofimetawixevifok.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_off0000c2f9.bin
19b0fd4b2f1779cc0f28bfef55c0a971e64a071c2747dd52596e1b3b25afacdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F9 5100 bytes
font_01_sfnt_off0000d454.bin
fc3e51341d781aec7af173a323ff5e15a958e1cf736938c9c89337e5ac697147		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD454 10736 bytes
font_02_sfnt_off0000f90c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 4324 bytes

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