Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9f27f0e768e530…

MALICIOUS

PDF

55.9 KB Created: 2020-08-18 23:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7718b830c8c13fc605c29cc51716e6a2 SHA-1: a98752aa83b10ab6121bb00193f5b1690d63696d SHA-256: 5b9f27f0e768e530ce9407bd82f69aa720b88d2e98710d606349ed81e417329d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for an annual report, suggesting a phishing attempt. The presence of many external links, including a link farm, further indicates malicious intent to direct users to potentially harmful sites.

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=royal+ceramics+lanka+plc+annual+report+2013
    • http://files.clevelandchamberchoir.org/uploads/1/3/1/8/131871648/5589c2.pdf
    • http://dajetimij.jennkarrasdesigns.com/uploads/1/3/0/7/130739267/wojapeginud.pdf
    • http://didefafeb.msdooleysscienceclass.com/uploads/1/3/1/1/131164250/bexojoj_josuzulewoto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1324/8923/files/ripojojubilapadinuboja.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/75043889615.pdf
    • https://cdn.shopify.com/s/files/1/0440/5461/0070/files/aplasia_medular_causas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/insect_attractants_and_repellents.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/android_definition_tagalog.pdf
    • https://cdn.shopify.com/s/files/1/0435/9674/2815/files/borazuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56070096689.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/age_of_empires_3_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3806/files/40984233898.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/verbe_avoir_et_etre_au_present.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/photoshop_free_trial_forever.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_off000094c6.bin
ff86ef2938f49475ae8ae429a704fce175a1422097c852dc4ceec8864a0bdaf9
pdf-font-stream PDF embedded font (sfnt) at offset 0x94C6 5740 bytes
font_01_sfnt_off0000a84a.bin
d44d0a4dc000c554cc65323130639df0a2e9f275888837e1a233f062012cb05e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA84A 13416 bytes