Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff032c4f8498f80f…

MALICIOUS

PDF

36.4 KB Created: 2020-08-21 19:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f752d161caf6acbd3253b9b82e058f33 SHA-1: f109e7e39c338fa4447484ef81f3a3f4fb07b186 SHA-256: ff032c4f8498f80fa752afb804117632ce5b6af423480c6898f324a781b16ade
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.cc'. This URL is likely used to funnel victims to malicious sites. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms used to distribute malicious content. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL.

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=baby+pic++full+hd
    • http://files.neptuneskiandboardcentre.com/uploads/1/3/0/7/130739204/8acd91129.pdf
    • http://files.greglewisstudios.net/uploads/1/3/0/7/130775260/jetixewuribava.pdf
    • http://files.chasecreekeventing.ca/uploads/1/3/1/3/131398108/3692233.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/sasuxizilimuwevosa.pdf
    • https://cdn.shopify.com/s/files/1/0439/6027/1006/files/honda_automatic_transmission_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/66431959868.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/94836197252.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/law_cet_2019_application_form_date.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/mazebewojibeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/14099897286.pdf
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/fajinozok.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_off00004fff.bin
5edc9ebed91b94a83d88a213e7304bc1f97868613a35af6f371e04fd0ae0491f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFF 5260 bytes
font_01_sfnt_off000061d5.bin
e383bc715481e5e4dbe0c1cc380dd1a45cdc5b305ccb6dda1470d0c4930ed9dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 9940 bytes