Malicious PDF — malware analysis report

Static analysis result for SHA-256 131d978658a0f153…

MALICIOUS

PDF

45.9 KB Created: 2020-08-16 13:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fed4f59e50f92ea7510122b4682815b3 SHA-1: 3df1e2533f6feabbdde3b58128caee1533304e04 SHA-256: 131d978658a0f153cfad95b892a0de763cc3c23d7699be752086f3505b3deab2
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the 'ttraff.com' domain. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=advanced+english+speaking+skills+pdf', suggesting a lure to disguise malicious activity. The presence of numerous other PDF links, many pointing to Shopify domains, indicates a potential link farm or SEO manipulation tactic to distribute the malicious content.

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/pify?keyword=advanced+english+speaking+skills+pdf
    • http://minidek.lvapa.com/uploads/1/3/2/7/132741099/numobodas_gojetavilin_xufum.pdf
    • http://files.wwdurantstory.com/uploads/1/3/0/9/130969260/bonosifusuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/sintesis_de_auxinas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/david_banner_like_a_pimp.pdf
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/joomla_templates_3._8_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/87286411878.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/arachne_the_weaver_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/begum_rokeya_biography_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2057/files/ang_abakada.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/the_history_of_thailand.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/62152934068.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/texatoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/giwobodobinifewofir.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_off000074d9.bin
f8138a6d58047aa29bf33ee9e50f445addd78d1bc62db97f7ea5d5cf6937fe7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 5432 bytes
font_01_sfnt_off0000875f.bin
73b32a829122f7527b05968dbbf62f13c6640878f3911d34e924de52ea968c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x875F 10492 bytes