Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d4c95802209820…

MALICIOUS

PDF

46.1 KB Created: 2020-08-14 21:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33ff0e398df3f449b07fab6f9b4ef0da SHA-1: 6827f3144f4c7d44be5bdaa22c776d89276c6eb4 SHA-256: f0d4c95802209820d35d711889cbb70addf1d028f90a9c0834279a8ce55c5d40
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm infrastructure hosted on ttraff.cc. This infrastructure is known to redirect to malicious sites. The ML classifier also strongly indicated maliciousness. The document body text is largely obfuscated but contains the malicious URL, suggesting the primary purpose is to lure users to malicious content via these links.

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=chirkut+film+song
    • http://files.joshuacneedle.com/uploads/1/3/1/4/131483148/3470068.pdf
    • http://files.pcconcertseries.org/uploads/1/3/1/6/131607232/4691912.pdf
    • http://files.csjmemorialfund.com/uploads/1/3/0/7/130776158/4604076.pdf
    • http://files.yourdayweddingsindiana.com/uploads/1/3/0/9/130969160/47ebb56a1e08d48.pdf
    • http://files.pruddlb.com/uploads/1/3/0/9/130969633/8558884.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/noun_determiners_worksheet_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/40123939417.pdf
    • https://cdn.shopify.com/s/files/1/0436/0624/5539/files/9599098232.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/chemistry_mcmurry_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/bukigojorapabedipag.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/6157978646.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/67475826113.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/food_allergens_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/77386187569.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/98269115344.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005538.bin
61974a794a17a57012ac0b50b72b0fa5040f42d217dbb670b7d2ca18abc26b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5538 4824 bytes
font_01_sfnt_off00006573.bin
a06763899ec8900da51379f4e0cfc08e7587e27a16f1432d0c58b9419fef701f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 6424 bytes
font_02_sfnt_off00007aa4.bin
7fecce0cbb326f1496dc5d5ce5f2915bb3cff818142575f361e14d1278900f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA4 10016 bytes
font_03_sfnt_off00009d10.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D10 4324 bytes

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