Malicious PDF — malware analysis report

Static analysis result for SHA-256 0297fadde212bab4…

MALICIOUS

PDF

35.7 KB Created: 2020-08-04 03:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 051f5b3dc1a70a330380ffede03fda0f SHA-1: 78d6c22435bbf1807983c1519e253f392bbe3b3c SHA-256: 0297fadde212bab4367c10324fc971e9f6839ace61d5359e3b17a207eea44aaf
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to external PDFs hosted on various domains, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.com/pify?keyword=higher+human+biology+questions+and+answers+pdf', is flagged as a malicious redirector. The document's structure and embedded links indicate an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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=higher+human+biology+questions+and+answers+pdf
    • http://rixafotaw.katycatsmusiclist.com/uploads/1/3/0/8/130874317/3061056.pdf
    • http://files.refracted.net/uploads/1/3/0/7/130740191/bamoparav-gulaj-tosuvino-mifukufabuzazul.pdf
    • http://files.kootingalmotorclub.com/uploads/1/3/1/3/131398386/20c7d7c58e0cb0b.pdf
    • http://files.decemberschildrennd.com/uploads/1/3/2/7/132741352/9260449.pdf
    • http://www.elginacademy.co.uk/?page_id=9934
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/law_and_order_svu_intro.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/bunulazimurawij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/mumaxevudofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/22574987531.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/lolutogumopi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/jebupoxafujezo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/fefibarotinowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/vinisadupavilimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/48918729613.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/60492665527.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/49006981261.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/ccna_routing_and_switching_espaol.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_off000044aa.bin
84f81cf1cf655e0fc4a0ee63d8a4d90b58d4888ae35e8a0ed87fc409484de0de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44AA 5876 bytes
font_01_sfnt_off0000587b.bin
3502f1f0b14fa6147d40eada058143b5bc63220fa60789d7b8fe7a050703c5db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x587B 1836 bytes
font_02_sfnt_off0000617b.bin
bafee7f4196b020e2669024b099529b2677db8ec52e05b152fc3b5b3a31642f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 9244 bytes

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