Malicious PDF — malware analysis report

Static analysis result for SHA-256 867f42304adfc858…

MALICIOUS

PDF

47.4 KB Created: 2020-08-19 20:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c77091535efa61d51b7bba1fc21fc533 SHA-1: f639ebf2b01fcbd8ef75f9b283a51eaa259d9bc3 SHA-256: 867f42304adfc858b99fc5a190c60d867fdbdf7811ec5ba44e10a8cde3d53e8e
152 Risk Score

Malware Insights

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

The PDF contains a deceptive document body and numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates a PDF link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=android+studio+install+gradle+version'. This suggests the document is designed to trick users into visiting a malicious site under the guise of technical information.

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=android+studio+install+gradle+version
    • http://gikugukem.cobbosseeconteesnowmobileclub.com/uploads/1/3/0/9/130969521/6c423cf50a18a.pdf
    • http://jusid.georgetownfoodland.com/uploads/1/3/1/0/131070356/5052859.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/haunted_heartland.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0428/8633/2575/files/27486583092.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/996793598.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/70400346650.pdf
    • https://cdn.shopify.com/s/files/1/0463/4876/3298/files/29874551798.pdf
    • https://cdn.shopify.com/s/files/1/0433/7981/8661/files/88962452752.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/crystal_reports_if_else_if_syntax.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/69268482396.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/the_disappearance_of_hatsune_miku_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/3817/7430/files/dolasek.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/label_parts_of_heart_worksheet.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_off00007607.bin
0be4bf9faff52b0031a1bfca0e7d387b2633a17d39f8d6b929083bdec57b437b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 5040 bytes
font_01_sfnt_off0000873d.bin
80ee182d16c1aec095c43d36a6174246550b483ec2f72c57adf2b0a896fbde97
pdf-font-stream PDF embedded font (sfnt) at offset 0x873D 12356 bytes