Malicious PDF — malware analysis report

Static analysis result for SHA-256 734ec94593eb670c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-24 01:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 049fac137c8bc354b599bf4f34d471f2 SHA-1: bca10d4ea0245ad2856b9183e854fc5c3d20411a SHA-256: 734ec94593eb670cd8a95721fc71cd93ce3c65a778fb2bbd833aac1f7d146a46
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to external PDF files hosted on Shopify and other domains, forming a link farm. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern involves luring users to malicious sites.

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=hatchery+management+guide+cobb
    • http://powupe.ridgeandvalleyforest.com/uploads/1/3/1/4/131453177/7befb4b59.pdf
    • http://sewuko.janmwagnerfineart.com/uploads/1/3/1/4/131454265/1807401.pdf
    • http://files.apg-ga.co.kr/uploads/1/3/1/3/131382531/mukusoxasoxidini.pdf
    • http://selez.fitrisslightstudios.com/uploads/1/3/1/4/131438563/zisikazapidif-zisezoti-nufel-pazivor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/gadininepefaluw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexikebesadunav.pdf
    • https://cdn.shopify.com/s/files/1/0429/5409/6806/files/jarubedirubigos.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/bordered_hessian_determinant.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1626/files/47529177448.pdf
    • https://cdn.shopify.com/s/files/1/0464/6171/4584/files/cancer_de_piel_diagnostico_y_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/59307475479.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/nixodoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/catalina_final_dmg.pdf
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/iowa_state_map.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/nezujaleneposupadukon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4431/5041/files/psychology_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0464/5784/7976/files/compuestos_aromaticos_nomenclatura.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_off00006608.bin
8cfc81d30974f0aba184496688518c2fae3d542247bf520372445e1be46a2923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6608 5344 bytes
font_01_sfnt_off0000780b.bin
0fe8ec7234222c3daa4e5256b8b124fb9037bc9ffdd5edcb44c43eb9769a7499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780B 10012 bytes

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