Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1446880752ac9d…

MALICIOUS

PDF

43.9 KB Created: 2020-08-24 00:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6634002c6d9b856bd73a6dddc6b93ff6 SHA-1: f52860eeb0cf314584eff231ab2f69f79e5740e0 SHA-256: 5e1446880752ac9d3aa608be0b7dde10818d67c3cb4143642d46f5dadacfdfb7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'cash award certificate template'. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic. The ML classifier strongly indicates 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.ru/pify?keyword=cash+award+certificate+template
    • http://givufi.rebeccacconklin.com/uploads/1/3/0/7/130775350/rakivumuwoxufegumoz.pdf
    • http://files.stanalexander.com/uploads/1/3/1/3/131384281/korewujajedif-kufiwet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/deductive_logic_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/budap.pdf
    • https://cdn.shopify.com/s/files/1/0439/2566/7995/files/marathi_bhakti_geet_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/the_alchemist_book_review_essay.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/xititibixikufiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/ibps_clerk_recruitment_2020_notification.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/john_deere_lt160_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/colligative_properties_post_lab_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/93891151610.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/22571922024.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/lufasewodarelivadagi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/anomalias_congenitas_del_rion.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_off00006a4f.bin
876ec776eaa0eaf1d3f79fc7a4adf4b97722e1f221f3fe7092a9ba1b0c4d4b93
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 5392 bytes
font_01_sfnt_off00007c93.bin
daba709ce3f7cad19d58a5e9201046b99944102c315cc5214530a8b0ed7c4900
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C93 12000 bytes