Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e3cd2a930ae3f4…

MALICIOUS

PDF

43.3 KB Created: 2020-08-19 14:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c0ebe231636cd00ec854ef39062e4cf SHA-1: ecee14385e702505cf64c91d28a2ed54c130d81e SHA-256: 11e3cd2a930ae3f43e30187111d978b0707db5475e1701a3a92a12b070e3c1bd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'business information technology' and includes the malicious URL, suggesting a lure for SEO spam or phishing. The presence of many external links points to a link farm strategy. No scripts were extracted, but the embedded links are the primary indicators of 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.ru/pify?keyword=business+information+technology+greenwich+university
    • http://files.mmedicalgroup.net/uploads/1/3/2/6/132682819/kazufitobalowapuzuno.pdf
    • http://rumafijez.linsonstudio.com/uploads/1/3/1/4/131437875/mozitovebisabitoxib.pdf
    • http://files.inmathclass.com/uploads/1/3/1/3/131380786/pedusidulosu-rawikitagude.pdf
    • http://wavex.goodmanhomesltd.net/uploads/1/3/2/8/132814718/3810772.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/jidomazerajiporirip.pdf
    • https://cdn.shopify.com/s/files/1/0461/0555/9203/files/chisel_honing_guide_bunnings.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/roman_art_and_architecture_mortimer_wheeler.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9868/files/pufepanabiwelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/29802309375.pdf
    • https://cdn.shopify.com/s/files/1/0431/5329/3469/files/augusto_roa_bastos_el_fiscal.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/81824089872.pdf
    • https://cdn.shopify.com/s/files/1/0429/3017/6159/files/butea_monosperma_review.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/sijosolalowux.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_off00006a8c.bin
d0a62aee76d0f74cf1124e6255bccb36c13b8e0a0a64ecc9a43b05dea9627e5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8C 5600 bytes
font_01_sfnt_off00007d88.bin
18c8f63ecfa0c1c73350bcce542322dc647bd6c3ae61805fdbcf663399ad8f33
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D88 10120 bytes