Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ba4012242dd1d2…

MALICIOUS

PDF

43.7 KB Created: 2020-08-04 19:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8929e7a07129fd6f65d698c30b74ebd3 SHA-1: 3c857051dd7c3f46d7c0552322e6b68ba761d9d5 SHA-256: 67ba4012242dd1d2ff6a08dc0e84a81872ccaa4015b4e440f320656f323bde99
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.cc/pify?keyword=architecture+residential+drafting+and+design+answers+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify links, likely intended to disguise the malicious intent.

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=architecture+residential+drafting+and+design+answers+pdf
    • http://files.aretemediaacademy.com/uploads/1/3/1/0/131070581/2141031.pdf
    • http://files.jbdivprod.com/uploads/1/3/2/6/132680949/495968c47a2fd62.pdf
    • http://files.docuprodrawings.com/uploads/1/3/0/7/130775045/nobabuzavetedoluxa.pdf
    • http://files.cardinalfastener.com/uploads/1/3/1/6/131606155/1833126.pdf
    • http://files.thegolfparadigm.com/uploads/1/3/0/7/130739488/216e825b24d2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/vixuzadinepamosiroj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/wigapom.pdf
    • https://cdn.shopify.com/s/files/1/0448/3943/6449/files/how_to_enter_steam_keys.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/40691832401.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/birla_mutual_fund_bank_change_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/4499/3181/files/98571993682.pdf
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/kagerou_theme_overlay.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9641/files/31315842203.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/vafotizojixedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/bewunidese.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/wukef.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/47347327430.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/kidepadetir.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_off00006ce7.bin
bb2733d0e00bf1227014ba4e879e7076939475dd7f003187f6741eda8c2f642c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE7 5496 bytes
font_01_sfnt_off00007fa9.bin
06ca3723e8b31e96dd4d9891a2b59393e300625ba69f6d9a7cba7deccc4432f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA9 9808 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.