Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56e779877827f37…

MALICIOUS

PDF

50.5 KB Created: 2020-08-16 22:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6f3a86feba8212a2e8bb240d60160f8 SHA-1: 1570ee01c58eddbd75bdc65365aff15f3d2b3abe SHA-256: a56e779877827f378a228ed0e9ca686f8eec449abcfbcbd9018a32f2cc12782d
152 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users through the 'ttraff.com' URL, likely to a phishing or malware distribution site.

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=the+kabbalah+magic+of+angels+pdf
    • http://files.heatherlemieuxwriter.com/uploads/1/3/1/8/131856173/4212d.pdf
    • http://files.thezoneevents.com/uploads/1/3/0/9/130969850/4428946.pdf
    • http://files.madebyloulou.net/uploads/1/3/1/8/131871891/59bfb6ba928ffb6.pdf
    • http://files.edisonamigos.com/uploads/1/3/0/8/130874431/losod_xamilekezon_basorujeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/78943895671.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/37267241831.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/96490178858.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/sabexopisanatofafukom.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/dipifag.pdf
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/85661286137.pdf
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/mugimozoweferiwukajiminex.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/41297197593.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/kasiluxefonofaz.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_off00008705.bin
51735221d8c0faaed8f1162a194493e301d65bf01c6992c744e67cd5d67d17f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8705 5628 bytes
font_01_sfnt_off00009a09.bin
58d19c8a909b446ebf99ff6570fe87fb08979ee401a0a46eb21cf48c987d1cc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A09 10456 bytes