Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e78251bb2457a2e…

MALICIOUS

PDF

45.3 KB Created: 2020-08-15 04:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfa321d2ac694dfd0b0f4b46cb179059 SHA-1: 387c7295b76c8e9d21b690f43ff8995fd9297b94 SHA-256: 5e78251bb2457a2eea8c4f7f2313a540492b0e36166b3f09f8211f518c43eaf0
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are part of a link farm, with one critical link pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to resume templates, and the primary malicious URL is https://ttraff.com/pify?keyword=resume+cover+letter+email+template. This indicates a phishing or social engineering attempt to redirect the user to a malicious site.

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=resume+cover+letter+email+template
    • http://files.susefarms.com/uploads/1/3/1/3/131380591/011b5fe7e1f7c.pdf
    • http://files.norcaair.com/uploads/1/3/0/7/130738513/bodetepalutukir-fevefiwi-zaxodagexox.pdf
    • http://femoxedun.reventnews.com/uploads/1/3/1/6/131606758/1bd1bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/genie_pro_98.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/botw_ice_keese.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/kudeziroxosiluxaluze.pdf
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/84485894792.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9011/files/78286633839.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/wazalalidasozelemejo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/40461260950.pdf
    • https://cdn.shopify.com/s/files/1/0448/0640/6295/files/75856853714.pdf
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/denuberadogumatu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2768/4760/files/garuper.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/18269426575.pdf
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/42727365206.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_off000073f4.bin
8b6ccde57c87dd615b85a7fab9789e13bdb426696c1085bf6ab267bace1b42fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 5148 bytes
font_01_sfnt_off00008566.bin
bf0123bf16c3d9224b5f335aabf944f65a2a665df7c7e114e11c9984605c0684
pdf-font-stream PDF embedded font (sfnt) at offset 0x8566 10276 bytes