Malicious PDF — malware analysis report

Static analysis result for SHA-256 143f83341ce0ee5b…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 23:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73e6eb3d13421aac27cf2732ebf2d9c5 SHA-1: 12f557b2578eebcbdb5b31203dbd95fd60c27611 SHA-256: 143f83341ce0ee5bb4c52d726840cb891ceb797fdb3ef89d3225c028daf2f9c1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ioccg+report+6'. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or malware 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=ioccg+report+6
    • http://files.protelica.com/uploads/1/3/2/6/132695575/tujelediledasif-kejalatotadas-xananabogovar.pdf
    • http://files.ironkoi.com/uploads/1/3/0/8/130873795/c6b3e610.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8679/files/kemevigajowotofet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/60807374902.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/51805209926.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/bundesagentur_fr_arbeit_kurzprofil.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3895/files/kmp_algorithm_java.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/kigir.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2885/files/ffxi_smn_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/58088701729.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/31915502466.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/74136355269.pdf
    • https://cdn.shopify.com/s/files/1/0439/4414/9150/files/27436315849.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_off00005d48.bin
2a935443a51bdc8e32af82598dbfd58c349cecca1bb8aa58a34f68eac8d83457
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D48 4772 bytes
font_01_sfnt_off00006d9a.bin
683b7095bf8fdf0543a4a4877efd93948e52c14ba83f22d3e4c11ce74f917730
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9A 10436 bytes