Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b1797b1188d4c2…

MALICIOUS

PDF

48.6 KB Created: 2020-08-25 09:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74ab8e18e292648734c04212907f202a SHA-1: c2d17ceaf44c32720a75863dde5b43e5d9ff7cf9 SHA-256: 82b1797b1188d4c217c233e26894c335594627380c76b88571eb1e0c4044e4f3
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'Yo whatsapp the latest version'. This link points to ttraff.com, which is known malicious infrastructure. The document also contains a large number of links to other PDFs, likely for SEO manipulation or to obscure the malicious link. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=yo+whatsapp++the+latest+version
    • http://files.allinonerenovationsllc.com/uploads/1/3/0/9/130968921/nigewanidine-kudilago-xikinafizip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/believers_eastern_church_liturgy.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/google_maps_saved_places.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/bololobaxuperekudil.pdf
    • https://cdn.shopify.com/s/files/1/0438/5030/1590/files/best_security_systems_for_homes_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/mamat.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/wifigizitef.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/kamewovobuzutujiwopatam.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/nalizefezoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/best_wow_private_servers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000751c.bin
680dd33a0a341a15b2cce148c022cb922e4ade5aadbe4aec935c2c5536ad07ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x751C 4808 bytes
font_01_sfnt_off00008579.bin
38300a01a9e7dca051949a800c5f9f6426fc1d0c972320f6dbf63d487971a6e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8579 9980 bytes
font_02_sfnt_off0000a7ad.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AD 4324 bytes