Malicious PDF — malware analysis report

Static analysis result for SHA-256 b722133939f09e18…

MALICIOUS

PDF

45.7 KB Created: 2020-08-26 01:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d29db8b34211b0dd0888e11dd42cd27 SHA-1: ad794ba7f939c18d14281083de76cbb00aecb87b SHA-256: b722133939f09e18cc4cd13b5a65a6aee3c98af988c9d565847ca8666c860782
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.me'. The document body, though heavily obfuscated, also contains this URL and numerous other URLs, many of which are benign Shopify links, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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.me/pify?keyword=paper+flower+templates+small
    • http://files.southwoden.com/uploads/1/3/0/8/130814110/904edbc.pdf
    • http://mumod.wendyscountrymarket.com/uploads/1/3/1/4/131438316/1191409.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/case_study_on_leadership_with_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/mandarin_chinese_english_bilingual_visual_dictionary_dk_visual_dictionaries.pdf
    • https://cdn.shopify.com/s/files/1/0440/9029/4437/files/22017110977.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/singh_is_king_movie_song_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4211/files/nejisawudug.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/suvode.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/magisterium_2_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/77907520635.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/cydia_tweak_movies.pdf
    • https://cdn.shopify.com/s/files/1/0462/7493/6994/files/aranmore_catholic_primary_school_uniform_shop.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/71737765568.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/momifopibezepumezofu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f7c.bin
4a4fc070f940dc7698a464ba93e2d508af91fb267e61061881fcd32111deeb0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7C 5140 bytes
font_01_sfnt_off000070f3.bin
d7457c35d25bc9bb6be94dbc93704fdf4c025df64c74bf4b16cf834126a608a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F3 10232 bytes
font_02_sfnt_off00009428.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
pdf-font-stream PDF embedded font (sfnt) at offset 0x9428 16312 bytes