Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7e0769f141fb10…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 02:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3ca3b16919dbfdf2159f6d4ef1a1d88 SHA-1: cab2f61f24468e77a96067b1638cfb321dfc8564 SHA-256: 6e7e0769f141fb10db5063bbed12cc44d6f6832463e356075171614461ceb30e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, which is indicative of a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.com/wix?keyword=razer+nommo+chroma', is flagged as a malicious redirector. 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.com/wix?keyword=razer+nommo+chroma
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/angled_gate_fold_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/tekidapugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73792904944.pdf
    • https://static.usrfiles.com/ugd/4dd980_27b122bfba224bb3a2384624ba9c70ee.pdf
    • https://static.usrfiles.com/ugd/e745be_d10501b72a7446928a75593541120c66.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f515dfc6a2b475083d6b3ddfd0b5506.pdf
    • https://static.usrfiles.com/ugd/b42fd6_d8c24b53f37742a1b6f78dd1a41af1f8.pdf
    • https://static.usrfiles.com/ugd/a467d2_1c10c0a6208646bf9a4e8e8a65892a0c.pdf
    • https://static.usrfiles.com/ugd/df4650_d7c695e008214817b45686a6eb0b4cad.pdf
    • https://static.usrfiles.com/ugd/b5aed9_8349160dcca745d2af4b32f4205be345.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/bowesavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/letters_of_recommendation_template_for_college.pdf
    • https://cdn.shopify.com/s/files/1/0432/2204/0731/files/80102245415.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9477/files/wejevodobefawafi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006234.bin
9544242e291b741efeedcc92e1bfa92fc4ffb5d71d68c49e5c553798cd9defc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6234 4888 bytes
font_01_sfnt_off000072ad.bin
20c8a93cfce81d061cd737cf48113f2d7f20d062458708660b2b7b22c7325eb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x72AD 11540 bytes