Malicious PDF — malware analysis report

Static analysis result for SHA-256 3988a700200c226f…

MALICIOUS

PDF

61.9 KB Created: 2020-08-23 22:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12d7352cee066038c7f66ed632269c50 SHA-1: 8f02144893e2dbfdf5e2f9f63cd351fa14ff241a SHA-256: 3988a700200c226fad5089bb8b2cdfc5a0685c4e31ee72b9af5250f1edf487a7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=clone+trooper+armour+templates
    • http://files.paulabarbercoaching.com/uploads/1/3/0/7/130776858/mufelubisulebiwuf.pdf
    • http://files.heronmediagroup.com/uploads/1/3/1/6/131637853/9791184.pdf
    • http://files.emorymichael.com/uploads/1/3/1/4/131408029/pofewodi.pdf
    • http://nejeluk.blog.deansoiltrek.com/uploads/1/3/0/8/130874493/e9969.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/97_ford_f350.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/xujukega.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/united_states_address.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/75940889435.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/48017984464.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/gattu_battu_mp4_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/dawumerawomitapeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/3507/3440/files/wilezapopiginidexepezune.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0054/files/19874636851.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/2132761313.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_off0000b636.bin
8ede84f38bcb769ac42020aaa0d01106000a5c7a3dcee173b39678291b377079
pdf-font-stream PDF embedded font (sfnt) at offset 0xB636 4868 bytes
font_01_sfnt_off0000c69e.bin
c7d1a151629ff85ec8aa0da0ca776ad382450f661873766a55b4bf468191d92b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC69E 10580 bytes