Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca41d154e808cd8…

MALICIOUS

PDF

45.9 KB Created: 2020-08-15 00:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da115c6eb5a4b10a6950f9ec81549b5c SHA-1: 0efd29943973565aee9276cafe3986a1adc077f8 SHA-256: aca41d154e808cd8020030a229c535e8cdd4c10751f44fc1acbfa667c8a1200b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body contains the malicious URL, suggesting an attempt to trick the user into visiting a potentially harmful 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.com/pify?keyword=water+in+landscape+architecture+pdf
    • http://bejatix.waterfordcounselling.ie/uploads/1/3/1/4/131482995/komukunazarizelixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1004/7645/files/aecc_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/test_laptop_battery.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/abdominal_migraine.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonuxifipepi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9536/files/autograph_tamil_full_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/latin_pronounciation_audio.pdf
    • https://cdn.shopify.com/s/files/1/0428/8646/3647/files/maharashtra_b._ed_cet_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/6176/2455/files/mufonokewikufefazazo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/70284686660.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/checklist_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8960/files/zopaloxoj.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073c8.bin
a5852270190c341cb76f8e086ff076ed0d212e7a72e8f1a84272b28e43551afe
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 5256 bytes
font_01_sfnt_off000085a9.bin
d309544d09ef95a1dd46a2430555965cfcdec5136044c2e9e2c15bde0398bde8
pdf-font-stream PDF embedded font (sfnt) at offset 0x85A9 10892 bytes