Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1b561e270e41da…

MALICIOUS

PDF

45.7 KB Created: 2020-08-20 04:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aada24e9d1cebe4a54a67e51d2523e1 SHA-1: c28f0cccc12ea10be19e02411217c701879a91b0 SHA-256: 1a1b561e270e41dafb5d10e689b616f7212bd257c94011b13d266e9de330d5d4
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.cc' is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning scheme intended to lure users to malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=9.+19+tft+cheat+sheet
    • http://files.g3digitalmedia.com/uploads/1/3/0/9/130969448/xamudivubajowu-luzomugotudis-wemop-nisuzuluvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/31936722249.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8019/files/440_source_heads.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/kezunutovepisekofaxapave.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0831/files/rural_areas_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/nutritional_information_brussel_sprouts_roasted.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/lebekitigakazenaxoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/dimikos.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/alexa_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/fotulajifaxulatefiwawoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/english_grammar_revision_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/vagukofegalujepusinisabuz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d13.bin
28f34044913d95f2955c45486d0897ba5a3bd50de2d20d2e3bca8340c6e8be95
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D13 4984 bytes
font_01_sfnt_off00007e09.bin
beb6f9f1577b6eb23bac6f660791f7b4dfc47974c04d9d9e069079be325306a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E09 14392 bytes