Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daeec16db3b4b17…

MALICIOUS

PDF

35.7 KB Created: 2020-08-08 23:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a50f5b144d25259157ffed54c108ee13 SHA-1: b20f13f3ac4319d12176ab0d3c5a106db9b69d81 SHA-256: 6daeec16db3b4b176a40a02ffb58f779d1aad6e274c889d2f6c695107485c873
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary link directing to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a link farm designed to lead users to harmful sites. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or redirection attack.

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=posthuman+ecologies+pdf
    • http://zefoxu.arknaturalintellect.com/uploads/1/3/1/4/131437601/b7d571f6.pdf
    • http://files.fromoureyes.com/uploads/1/3/1/4/131414561/badodusazodujegejez.pdf
    • http://files.gigglesphotographync.com/uploads/1/3/1/0/131071137/33e311.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/29668053495.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4650/files/xuridufapojixulel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/fajaraxizanavibabajiworug.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/222978095.pdf
    • https://cdn.shopify.com/s/files/1/0444/4828/4839/files/que_son_radicales_libres.pdf
    • https://cdn.shopify.com/s/files/1/0436/1283/1907/files/lexus_is300_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/46269947490.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/kakonilezatupekodafetarap.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/31938570888.pdf
    • https://cdn.shopify.com/s/files/1/0437/6851/2669/files/cicely_berry_jaw_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/67963605014.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3090/files/xavemepo.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_off00004e71.bin
7fd08b011eb18bfb08b0b86b52259a9059399c81282faff4bf89accacdd29f79
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E71 5476 bytes
font_01_sfnt_off000060f0.bin
6c9aef628d7a20b3c3f3ad73de832c61439935733297600754f9c12be17e0d38
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 9784 bytes