Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97d056c2039692f…

MALICIOUS

PDF

60.4 KB Created: 2020-08-31 18:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 117735e9c8f9ff2c68cee791d1034760 SHA-1: 59604967f13c458162629d7a75523f2c77403b00 SHA-256: d97d056c2039692f99176ca84e08e902fc8828f466550e7945dba778929c2519
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 'https://ttraff.cc/wix?keyword=direct+and+indirect+expenses+list+in+pdf'. This URL is embedded within the document body, disguised as a list of expenses. The ML classifier also strongly flagged this PDF as malicious. The document's purpose appears to be social engineering, directing users to 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.cc/wix?keyword=direct+and+indirect+expenses+list+in+pdf
    • https://cdn.shopify.com/s/files/1/0465/2351/5030/files/38536386162.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2092/files/happy_farm_candy_day.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/vujabijozebazu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/20633881603.pdf
    • https://static.usrfiles.com/ugd/739437_2fee51f3a41246128378085331590668.pdf
    • https://static.usrfiles.com/ugd/b8c837_f01af733c58e4aa88c4ad5656da32729.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3821/files/goril.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/zopifamed.pdf
    • https://cdn.shopify.com/s/files/1/0436/6571/9449/files/22984548596.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/fundamentals_of_engineering_thermodynamics_8th.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/bingo_numbers_1_20.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9564/files/very_hungry_caterpillar_lesson_plan.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/90689634064.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_off0000a47e.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA47E 2828 bytes
font_01_sfnt_off0000ae78.bin
30e6da5795315a8eabb91a6d588a3eb2e86a38fbcf1d164536d5d51cdc8e85c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE78 5216 bytes
font_02_sfnt_off0000c051.bin
d6375bc881681d8716c16248a53c0481f43ca37cd608acea4a4370626e54aae2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC051 9932 bytes