Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae8be708e3b6d1a…

MALICIOUS

PDF

54.9 KB Created: 2020-08-23 15:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08f0abb52a684fe663a65809e12387f7 SHA-1: 3a1f387d05345dcfbbbe4e212bf099170cf40a4e SHA-256: 0ae8be708e3b6d1a194742a8a11ef53eae145870230190f785776de186a96f8c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a PDF link farm, with the primary purpose of redirecting users to malicious infrastructure. One such redirector URL is https://ttraff.cc/pify?keyword=canine+falciform+ligament. The ML classifier strongly indicates maliciousness, and the embedded nature of these links suggests a phishing or malicious content delivery attempt.

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=canine+falciform+ligament
    • http://files.ekamniearth.com/uploads/1/3/2/7/132740275/19f337f04c42.pdf
    • http://wokasej.rootminerals.com/uploads/1/3/1/6/131606490/sasulibotidajuwesaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/sezavarolesapasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0714/7162/files/popabifogavevereka.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/14390111929.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/big_anthony_his_story.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/kivitimalogupavevolag.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/38169364413.pdf
    • https://cdn.shopify.com/s/files/1/0437/6474/4343/files/6422679046.pdf
    • https://cdn.shopify.com/s/files/1/0429/2375/3635/files/rakonirurisozipixebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/ginukitebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/38510567428.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/94281542540.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/90344764701.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_off00009575.bin
9bbd8e9239fa2942197e32e01285f697f9e96fde9d51306c11205a361b3ec3f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9575 4928 bytes
font_01_sfnt_off0000a626.bin
969afa08f6f6d557f6bd5e3de930e0fbd731156670091ebe746534adb27696fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xA626 12828 bytes