Malicious PDF — malware analysis report

Static analysis result for SHA-256 9364820412599a98…

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 13:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cefdc012294e7214d6a130943beae5fa SHA-1: d584d61545b66e1324137d917eed313b1dadbe43 SHA-256: 9364820412599a989d8d270dbda1a32a29ce6e9e708b1ae3cf92350f43d752d7
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious content. One of the primary URLs, 'https://ttraff.ru/pify?keyword=original+gorilla+glue+technical+data+sheet', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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=original+gorilla+glue+technical+data+sheet
    • http://files.kcga4u.com/uploads/1/3/1/4/131406749/ritinumivuwewip.pdf
    • https://cdn.shopify.com/s/files/1/0437/2532/4439/files/cabala_numerica.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1447/files/ielts_academic_reading_tests.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/faxetadekagelomew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/5006/files/networking_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/giwenunosezakulinipiwone.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/lawafokeriwigarososop.pdf
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/baaghi_movie_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/53216389278.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/vovazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/vigusok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6945/6028/files/pinodanujokanowafusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/nubenik.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_off00005d9f.bin
d0ad2dfa5584145dbbb82573485bf0259a15b41a050b53eebae68aa4420a3d19
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9F 5228 bytes
font_01_sfnt_off00006f58.bin
c936d1de527b96611048de766d2e2c865732ed773f5609e035f2a28e29e62d06
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F58 10160 bytes