Malicious PDF — malware analysis report

Static analysis result for SHA-256 9354ca04e3a1c2c1…

MALICIOUS

PDF

44.6 KB Created: 2020-09-18 11:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc5602567f239278e197673f547c0df1 SHA-1: 94b734c8e7da8be02eef4639d035c12cdbb54818 SHA-256: 9354ca04e3a1c2c13e7f9fe1c9879eadc9bca1b6bf55303c3def6fce04872a29
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, ttraff.link, is identified as a malicious redirector. The document body contains text that appears to be a lure, referencing a 'scary movie with old lady in rocking chair', which likely corresponds to the malicious redirector's keyword parameter. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=scary+movie+with+old+lady+in+rocking+chair
    • http://files.threeringrascals.com/uploads/1/3/0/7/130740586/kogaritaxibopajipe.pdf
    • http://lodiluja.pembrokeactivelivingcentre.com/uploads/1/3/0/7/130776279/0b1b35eb.pdf
    • http://livaruf.slovak-tourguide.com/uploads/1/3/2/8/132814930/5c08c.pdf
    • http://files.beadsnbottlecaps.com/uploads/1/3/0/7/130776749/zalumotapimesu.pdf
    • http://tudul.nocofoodincubator.com/uploads/1/3/0/8/130814855/milelitopolow.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/aadhar_card_with_face_authentication.pdf
    • https://cdn.shopify.com/s/files/1/0462/5278/5813/files/chemistry_problems_exponential_notation_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0463/3070/8129/files/kutikotofexudafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/9696228561.pdf
    • https://639f8836-64c9-446e-9a27-4e4a3848bdfe.filesusr.com/ugd/b0cb2d_bff1d813ed8846d0a4123be0e4325e66.pdf?index=true
    • https://5b203224-862d-498e-9836-b541611f65ab.filesusr.com/ugd/0511f5_df3dd7ee120d4e848d373518f947162b.pdf?index=true
    • https://a3be82e1-59ff-4ebe-9abb-623c817933cb.filesusr.com/ugd/debbe1_186dc8e285994bcdabeca18a95434ccd.pdf?index=true
    • https://d25078fc-5fc5-41a6-b79a-eb5ee1589ffb.filesusr.com/ugd/8b4172_0086594a22a04becbd7a60ddda57e219.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/constitution_usa_video_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/75165509790.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6281/files/volugugopatejuvidopineg.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_off00006e97.bin
cb6f48b4319e82604318fbe973c16e3f643b92266740a26b4a908986c69147aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97 5596 bytes
font_01_sfnt_off00008190.bin
cd69d543dac22ef683f64d7d9249e127cb47fa464704ee2129cc064d2bda8c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8190 10512 bytes

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