Malicious PDF — malware analysis report

Static analysis result for SHA-256 656def2f355a78b3…

MALICIOUS

PDF

46.6 KB Created: 2020-08-30 16:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa4c67e50e5eaf6bcaa7e9ba08565ec1 SHA-1: 88052f7ff7228f82d8b82dac71f885958a374fb2 SHA-256: 656def2f355a78b38281a10e8577d2be38f0f2d7461ed77533d621e34eae3135
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a critical heuristic firing for malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=have+yourself+a+merry+little+christm, which is flagged as malicious. This suggests the document is designed to redirect users to malicious content, likely a phishing or malware download site.

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/wix?keyword=have+yourself+a+merry+little+christm
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/beped.pdf
    • https://cdn.shopify.com/s/files/1/0431/8448/8607/files/arihant_all_in_one_class_12_accountancy.pdf
    • https://cdn.shopify.com/s/files/1/0460/6728/6180/files/lopegapalugazikibomix.pdf
    • https://cdn.shopify.com/s/files/1/0434/3074/0135/files/paypal_money_adder_no_human_verifica.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/zewarotevupiwesamope.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_33a3c35a3edd41b98656443a50b4b7b7.pdf
    • https://static.usrfiles.com/ugd/b914b5_e33d64b4bf4f4ac78fad3d18b67c23cf.pdf
    • https://static.usrfiles.com/ugd/6240f8_17369abd74e547b29ec7838cdce2b26a.pdf
    • https://static.usrfiles.com/ugd/22bf55_a4763a20a8f748bbb2032e2667e371db.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7519/files/loforarofosamow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/fepuri.pdf
    • https://static.usrfiles.com/ugd/0047a4_6a3fa34b578d4dbda5375e3d74e5b77c.pdf
    • https://static.usrfiles.com/ugd/12f4eb_89c7c6b4a93943e9998a99233fe505a1.pdf
    • https://static.usrfiles.com/ugd/10e3af_560bac91db5d427fa36e6e210347c7ba.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_off00006bbb.bin
0342edcae94fda5ba791f70e5c83837af61a3632cbd7d041541b5fb09d62c657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBB 5020 bytes
font_01_sfnt_off00007cde.bin
2065de59c2f30dbe562a282c4e44eff4b9bc3882c5bb17b6e3f4c6227c2fdec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDE 10092 bytes
font_02_sfnt_off00009f7b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7B 4324 bytes

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