Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e0c1a5da9ba5d8…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 18:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2312d19d94eefed9efa55f5181def068 SHA-1: 8fdcc676ed08d5899788bbc2ff3e7a6ff9d19f28 SHA-256: e3e0c1a5da9ba5d8ae787ece2ebb70c853c0900b419670c4408c6961a8f06ce8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, identified as a 'PDF link farm'. One of these links, 'https://ttraff.cc/wix?keyword=free+paper+border+designs+templates', points to a known malicious redirector. The document body contains garbled text but also includes the same URL, suggesting it is the primary lure. The presence of numerous links to external PDFs, many hosted on cdn.shopify.com, indicates an attempt to inflate search engine visibility or distribute further malicious content.

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=free+paper+border+designs+templates
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/gibefojenojokibo.pdf
    • https://cdn.shopify.com/s/files/1/0462/3515/6631/files/sinorasel.pdf
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/2823604086.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/3109909479.pdf
    • https://cdn.shopify.com/s/files/1/0454/4344/8990/files/fopafomigonalufalobaro.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1d29e3d5b57467cb733da6a0c7d41b8.pdf
    • https://static.usrfiles.com/ugd/79cb75_b45b225724e048808dda4fe412d195da.pdf
    • https://static.usrfiles.com/ugd/8b9728_0406214c488c413095340921a94945f6.pdf
    • https://static.usrfiles.com/ugd/08fe48_1afc5ceabf7b400ebb68e1af65f753c0.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/somagozaradinibatoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/5219/5230/files/budgeting_in_cost_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0439/9982/1982/files/after_we_collided_free_wattpad.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/my_age_of_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/mulipotazanidenirixuti.pdf
    • https://cdn.shopify.com/s/files/1/0428/6503/3383/files/kinds_of_adverb_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/antrepo_rejimi.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_off000058b9.bin
bc94c7fd85802c8073efbbabeb4f2d062db51600b29d86ee3452f5338f90b3af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B9 5372 bytes
font_01_sfnt_off00006ad9.bin
6168165ae34ba7f224ada670d3960b96dc5a004234f2dd8903920591da90f686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD9 10092 bytes

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