Malicious PDF — malware analysis report

Static analysis result for SHA-256 724e1ddc003d8641…

MALICIOUS

PDF

47.0 KB Created: 2020-08-18 17:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64a96f864983a75a87d9a96248535fc0 SHA-1: 0c016ca75e75e300b1525931d78a70fdd36dbe0a SHA-256: 724e1ddc003d86414b304eeeca3d00768672ecdee6551a6fe59b720c20d28134
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link directs to a known malicious redirector, indicating a malicious intent to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=ads-+b+base+station
    • http://files.theitchurch.com/uploads/1/3/0/9/130969717/3521539.pdf
    • http://files.rickerskinderkamp.com/uploads/1/3/1/4/131437987/18245.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/45750939989.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5397/files/26754358484.pdf
    • https://cdn.shopify.com/s/files/1/0429/4452/8550/files/thalassemia_rcog_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/78069933191.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/antigone_sophocles_don_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1954/files/godupujojabowam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8765/1235/files/jaiib_accounting_and_finance_for_bankers_module_a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0441/0998/7992/files/93532250001.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/mikamalomilotiveriruf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/imaginarium_6v_express_train.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4f.bin
7633da0c7ecc0e73811531e9fb1dec4886b31a66bcd5541f3fda7e2e58fa43b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4F 4640 bytes
font_01_sfnt_off00007c25.bin
25a5fae6133550a4b0623c3eea499b933eac67f1a1a4ff53e0e87f7dfaef1d98
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C25 10740 bytes
font_02_sfnt_off0000a0f0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F0 4324 bytes