Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bff00f019fb93f4…

MALICIOUS

PDF

39.7 KB Created: 2020-09-01 03:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fe64cbe57471cb6b5df14c7a19e51e6 SHA-1: cf726c7d936c4865d6aabe0c24a8c67b6dfb159e SHA-256: 6bff00f019fb93f44975425ece0733e13305665c97085805b0f6afcecccfabc4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'consulting industry report pdf' and the malicious URL, suggesting a lure. The presence of numerous Shopify links, while mostly benign, indicates an attempt to blend malicious links with legitimate ones, a common tactic in SEO link farms.

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.ru/wix?keyword=consulting+industry+report+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/36556560724.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/gotham_font_github.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/kifeto.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/fititotokezemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/virezogosomulanovukimugup.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/tanab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/28936502114.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/my_favorite_food_and_drink_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/astm_d790.pdf
    • https://cdn.shopify.com/s/files/1/0440/6280/2070/files/wevuxovutatizerupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9945/files/holt_mcdougal_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/journal_of_psychology_and_christiani.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.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_off00005de5.bin
ba962e3cc94df6d5622c3e0597f35be221a98d98c26184ad86ed62ae20e41b69
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE5 5004 bytes
font_01_sfnt_off00006f01.bin
1ed0e9c001e405a7e181bbc5dd73197f2579aea1a6a4a5f652726439a0fa0548
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 10228 bytes