Malicious PDF — malware analysis report

Static analysis result for SHA-256 326c30f4e12930d2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-11 06:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e31aab16c4bba54bff1cfd991606bc65 SHA-1: 3db4c89d89b123dfcce3b81fa7a95a371c6a888b SHA-256: 326c30f4e12930d262c45d70c7d1cea67e72a0fa4218e0c6ff3c92c621dc2c52
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to benign Shopify domains, but one critical link to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary purpose is to redirect users to potentially harmful 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/pify?keyword=msa+altair+4xr+pdf
    • http://files.whitepicketflowerfarm.com/uploads/1/3/2/6/132681771/sepidol_kudazafejekir_sudojago_fijepidi.pdf
    • http://files.5ensesfood.com/uploads/1/3/0/8/130813860/48be060d3.pdf
    • http://files.ddaynormandyguide.com/uploads/1/3/1/3/131384735/bevubowenigiv.pdf
    • http://files.acacr.org/uploads/1/3/0/7/130776536/roretomeliji.pdf
    • http://files.tukatafoundation.org/uploads/1/3/2/8/132814990/166765.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4589/files/xitajiwixozesetejolo.pdf
    • https://cdn.shopify.com/s/files/1/0448/2190/5570/files/the_problem_of_pain_cs_lewis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0409/files/90480043275.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5790/files/dofatude.pdf
    • https://cdn.shopify.com/s/files/1/0432/3809/7051/files/28978660546.pdf
    • https://cdn.shopify.com/s/files/1/0435/7865/4883/files/85957385520.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/nesavopitugunuxapudafole.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7740/files/canon_in_d_piano_easy_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/bahamasair_flight_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/cofferdam_construction.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/webufesekulagedab.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/dakigenilazigepupamodod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000595d.bin
8ff456be465791e439397736b719cb7c384c21d290614d2164e069e914e5907c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595D 4652 bytes
font_01_sfnt_off0000693d.bin
8e7f8bd098686dac6dce25d503886e674715a03b09b16b3aa6b9b5d2458a4e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 10168 bytes
font_02_sfnt_off00008bd1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD1 4324 bytes

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