Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfc11d3353e32ec…

MALICIOUS

PDF

43.1 KB Created: 2020-08-27 16:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10d287cfb6430a17059e87dd016bcf80 SHA-1: efef2719b547adb99e83a5c7ca5622ba9c203c61 SHA-256: bbfc11d3353e32ecbb6a33eeb9d901ef8fafbee3e507507d080ee6db70c359bf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm designed for SEO manipulation. It contains a high volume of embedded links pointing to various PDF files hosted on Shopify, likely to artificially inflate search engine rankings. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=legend+of+queen+opala+ii+walkthrough`, indicating a potential phishing or malware distribution vector. No scripts were extracted from this sample.

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=legend+of+queen+opala+ii+walkthrough
    • http://files.nbpsrc.ca/uploads/1/3/0/7/130740077/3622438.pdf
    • http://debit.bulleysoccer.com/uploads/1/3/2/3/132303382/7966082.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/all_aarti_sangrah_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7081/6407/files/77730047537.pdf
    • https://cdn.shopify.com/s/files/1/0454/0589/6872/files/nevada_learners_permit_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/gikevowugulafeduvafirujan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0465/5844/5718/files/lubenuji.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/nututitekubanamijemetew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9730/0899/files/benim_hocam_abt_tarih.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/passion_pizza_liverpool.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c90.bin
36ab85ea7e9a5daa35ee2d4221c9751bc16107fcba9a357f10a6322a5eb99935
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C90 5232 bytes
font_01_sfnt_off00006e64.bin
61d8d1b220d02f5e8952b06eff0303ccdfe23b60e6eda726c6337279689a81e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E64 10420 bytes
font_02_sfnt_off000091f4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x91F4 4324 bytes