Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2afd407f47c132…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 02:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 940bb4c4e5da20d57cdb7cdcb08125b1 SHA-1: aa0e095122be289cf91e658d89cf359ec9061300 SHA-256: 8f2afd407f47c1325b8cc30708814a62119c53aeac7db07675e8f8212b9b6945
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body text, though heavily obfuscated, contains a string that appears to be a lure for a 'machine maintenance log template'. The primary malicious URL identified is ttraff.cc, which is known to host redirectors. The file also contains a large number of other PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final destination.

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.cc/pify?keyword=machine+maintenance+log+template+excel
    • http://files.yrdyouth.org/uploads/1/3/0/7/130739144/tusonokevomop_zutibinajir_numilem.pdf
    • http://files.nourishmeantshop.com/uploads/1/3/0/7/130775380/jufuweroxobedub.pdf
    • https://cdn.shopify.com/s/files/1/0429/0094/7103/files/fugadusixevilujogoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/vosugunubaxowavudaxumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22700630349.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/52697547346.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/47513221477.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/my_first_day_of_kindergarten_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/jutemimomafivuzavi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/dijideval.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/zeraromak.pdf
    • https://cdn.shopify.com/s/files/1/0430/0996/6239/files/samibozonanexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/88240480578.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/antisocial_personality_disorder_questionnaire.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_off00006918.bin
282527e945d61a109a428110deb2eaffb82fb9b915d2ee4914e78d48be2cfa00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6918 5148 bytes
font_01_sfnt_off00007a75.bin
e7f8e623cf40d008530714cdec3385b532799252e5f66fec4ab00fbe0b448459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 10448 bytes

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