Malicious PDF — malware analysis report

Static analysis result for SHA-256 c584787a238b8ff4…

MALICIOUS

PDF

60.4 KB Created: 2020-07-26 14:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c52fd040dc0d2786bfbcadf82a91668c SHA-1: f80bea0f9a6374ecfd26a15be6350b4234b18501 SHA-256: c584787a238b8ff4e2de936650c0cb417fc8035f38d6780d60d559c9cf13f60e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous links, including those hosted on potentially compromised or newly created domains, suggests an attempt to lure users to malicious content. The document body is heavily obfuscated and unreadable, providing no further context.

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=aspartame+toxicity+information+center
    • http://files.briargacrew.com/uploads/1/3/1/3/131384656/xosekujimux-runelikizata-poxenep-dujawibiwu.pdf
    • http://files.pinakainteractive.com/uploads/1/3/2/6/132683135/9292542.pdf
    • http://files.phenomenalprotectivesecurityservices.com/uploads/1/3/0/9/130969061/28da8cd06648a.pdf
    • http://files.petrocellicaffe.com/uploads/1/3/1/4/131438405/wisamafusiwite_giterakewa_kimerirenag_lavunarusif.pdf
    • http://files.nicholetterouthier.com/uploads/1/3/1/3/131397996/kukaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/jojokugabikoneserumosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/20767176053.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41697505155.pdf
    • https://cdn.shopify.com/s/files/1/0428/4511/0438/files/vazofizorunofidigajani.pdf
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/96243683341.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/bamebotig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/83690202761.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/20730511245.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2919/files/wiwese.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/gogimeloranara.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7218161301.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_off0000af97.bin
0f9cb7b342dc8b142aff6ea441c9bed2e7bbcdc199eff50ab7ece12b8c550ad2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF97 5076 bytes
font_01_sfnt_off0000c0c5.bin
a2a148152108800cefd9ff8aaa2f86112044c152959d8433f5e71aa9dfe22fe7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C5 10316 bytes