Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3721a1a935ec56…

MALICIOUS

PDF

34.1 KB Created: 2020-08-22 23:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60191fb1d3fc0dcc16b17e2194e40de8 SHA-1: cf27cff388d0c7743551e370be391e957bff3302 SHA-256: 6c3721a1a935ec565bd679ac39c2ff567d6cb6b0a5b0e21e96a2f11842f2db65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a movie title, which redirects to a known malicious infrastructure. This suggests an attempt to lure users to a malicious site, likely for phishing or to download further malware. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, but the primary malicious redirector is a significant indicator.

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=beyond+the+mask+full+movie
    • http://files.hisandhersboutique.net/uploads/1/3/2/7/132740536/1950206.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/33611641432.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/gotarewawitixosapawake.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/64675772053.pdf
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/sosigixasowiritixad.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/namolibovidezonopurepol.pdf
    • https://cdn.shopify.com/s/files/1/0460/6558/2235/files/wulalurizunatekovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/libro_de_quimica_enlaces_quimicos.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/ctet_answer_key_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/0068/2906/files/afloat_shopping_guide_navy.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/53457568723.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/21400116684.pdf
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/canterbury_tales_the_merchant_s_tale.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_off000046a1.bin
a6f4d35544b9ba08e281205e569f31320b9c5da6ebd8a0975187d8d8eb7b869d
pdf-font-stream PDF embedded font (sfnt) at offset 0x46A1 5328 bytes
font_01_sfnt_off000058a5.bin
682ec7383beb279b254bd612dce6fde68714c7a87f37bb62556a373ef3775651
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A5 10304 bytes