Malicious PDF — malware analysis report

Static analysis result for SHA-256 0181b17342cf3636…

MALICIOUS

PDF

39.3 KB Created: 2020-07-30 23:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff96bd0ff6329b04ef0b46ddba6ce35e SHA-1: 82ae9b8a3783686864c2bbb65a2811becff89d00 SHA-256: 0181b17342cf3636bd55b0392aefb45ce6443c663e0b3f97b073b9a54ead36e3
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a malicious intent, possibly for SEO poisoning or phishing.

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=egypt+concession+map+2020+pdf
    • http://files.staceymason.com/uploads/1/3/1/1/131164382/3401790.pdf
    • http://files.robinsonelmwood.com/uploads/1/3/1/6/131636828/livaxabo.pdf
    • http://files.fromrustcg.com/uploads/1/3/1/8/131856331/worojegedipuba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/vibipibota.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/gazopinoxebigowowimudijud.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/35032581897.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/28731682361.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/bukavivaki.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/78932499058.pdf
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/kekubifovajemoxumiza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/7348257597.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/92647520812.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/vokifase.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_off00005938.bin
de8076348ecf4bce7633aedf6b013dbda1a407d4add432f39b831d72933fdab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5938 5468 bytes
font_01_sfnt_off00006bc8.bin
9f69fcebafb1bd3c71ca6985ac33a603e72afbe9bf71e42c90e50f98af6e1da6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC8 10668 bytes