Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f2879351cd2ed8…

MALICIOUS

PDF

37.0 KB Created: 2020-08-22 00:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df4e5b12559a0fdd93b0b6357716558b SHA-1: a2188b57689bcb65ccc3a01cdcb5daf7d41a9872 SHA-256: 02f2879351cd2ed8ef4486d22425506a0cab8ef96251d0d47b9560b1f03d48cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains the primary malicious URL. This suggests an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing.

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/pify?keyword=acetate+sheets+stencils
    • http://sopera.smartgriddesign.com/uploads/1/3/2/7/132712207/2313e98f6a.pdf
    • http://gejuwoxe.saclegalprep.com/uploads/1/3/2/7/132712237/buridulof-nofusavuselazi-fetimowas.pdf
    • http://files.equivistacoaching.com/uploads/1/3/2/6/132696111/polumazub-wumaf-gogunoxo.pdf
    • http://gesavisa.igcsebusiness.co.uk/uploads/1/3/1/4/131482975/bogogofaranobo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/7870523109.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/fejexatefugufirixufekuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/greatest_love_of_all_chords.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/jotejifaxulixefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/99177700629.pdf
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/bunudebewifomekovulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7037/files/desolokifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/talasif.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/royal_order_of_adjectives_worksheets.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_off00005545.bin
f2a988a6a9def3de87cce03f1e446b120f7db03238e3e242273b34faa0286ffc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5545 4780 bytes
font_01_sfnt_off00006573.bin
57bb080369226d4b0c55822c07fd79d18204eb184179a9cd56dbeb12f0e84a84
pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 9960 bytes