Malicious PDF — malware analysis report

Static analysis result for SHA-256 6542f2d42b01abb6…

MALICIOUS

PDF

41.6 KB Created: 2020-09-06 11:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93af4cd140f7f91ed204626b49ebd69e SHA-1: a7fb0e9933626924abe8538b2000a8ef9646fcee SHA-256: 6542f2d42b01abb646892775d2f5a492b2799aa8d03b0c8063fef82a635096b9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to a known malicious redirector, which is also present in the document body. This redirector likely leads to a malicious site or payload. The PDF also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or redirection attempt.

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.me/wix?keyword=classical+music+album++blogspot
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/bexomapamawan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1317992411.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/6265846783.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/mumatazuzili.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/developmental_psychology_childhood_and_adolescence_9th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7549/3271/files/30219110489.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5819/files/devsecops_best_practices_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bukidesokat.pdf
    • https://cdn.shopify.com/s/files/1/0435/5375/1189/files/suzikidasuwit.pdf
    • https://cdn.shopify.com/s/files/1/0440/9910/9016/files/finnegan_neonatal_abstinence_scoring_system.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/advanced_subnet_calculator_9._1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://static.usrfiles.com/ugd/73c254_764314e081844b9393fb60c550fccaf6.pdf
    • https://static.usrfiles.com/ugd/defcb2_5e0e7bdadd774951a9671dff5d0a25ea.pdf
    • https://static.usrfiles.com/ugd/c20ea7_18b47fdd95ea43a7b20ae7e7d1d54383.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7e2ac6b38044181aedb1d95bd66ee17.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_d0c36ed35b4c4a03b1400c7b98751bee.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_off000065bd.bin
e692eb7dc3dffca10fbb97c920a50539190ed8ad56c79e8e0439007ebd3efd93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 5200 bytes
font_01_sfnt_off00007758.bin
3558c0ca24e1246eee0f6163bee759e259893df00d14d76a17763a1181fc56dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 10008 bytes

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