Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ba11afee73cfbf…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 22:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f8f8ecc4ace8a5183b9b8bf89e2cd5b SHA-1: 7b05b43728c6631582432c7a175303d4d5702eb2 SHA-256: 34ba11afee73cfbf54bf4fe933e9a36104eb66849df846b3a985c6021530595a
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning attack, likely intended to redirect users to malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/wix?keyword=microeconomics+parkin+13th+edition
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/momopufobojep.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/murray_ky_zip.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/ups_waybill.pdf
    • https://static.usrfiles.com/ugd/b91566_e75101016d674eba9197449e743fae36.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e529965e6e147beb781697430368693.pdf
    • https://static.usrfiles.com/ugd/b8c837_03b79bbc41cb40b0a2e6c983721a8b59.pdf
    • https://static.usrfiles.com/ugd/b8c837_84be9afa38154b139808240a5b1dc8c2.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/fezataledadapefukerikizow.pdf
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/letter_from_birmingham_jail_summary.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/balance_body_pilates_reformer_iq.pdf
    • https://cdn.shopify.com/s/files/1/0438/1150/4288/files/galvanized_steel_sheet_thickness_in_mm.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/adobe_lightroom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.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_off000066da.bin
f2f2142c2329b749fb38d0cafae2ce2fa7d152817a64ef6b381d448c598a78fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x66DA 5564 bytes
font_01_sfnt_off0000799c.bin
459021dd103ee6c472af03b127a59ab537087d058b70510f4ed3f5533d0efefa
pdf-font-stream PDF embedded font (sfnt) at offset 0x799C 10820 bytes