Malicious PDF — malware analysis report

Static analysis result for SHA-256 386314e5eacce6fa…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 14:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5bb23ef7c84224788b8a9d1a5ee0fa6 SHA-1: 02106a59d43d9dc328c0b47e76ac0a6a455c933e SHA-256: 386314e5eacce6faf072f5e4d22a2affb3fe6ac36095520674ba8d1a874f1547
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body also contains this URL, along with numerous other links to Shopify domains, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is designed to redirect the user to further malicious content.

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=multiplying+radicals+worksheet+with+answers+pdf
    • http://files.focusedlifecoaching.org/uploads/1/3/1/3/131379949/9e07403d3.pdf
    • http://files.marksmarket.ca/uploads/1/3/1/8/131856380/4e3f33d.pdf
    • http://files.wwfishingtackle.com/uploads/1/3/0/8/130874029/kimenulod-kudiki-jofadajejuvajig.pdf
    • http://files.dirtypawprintsaussies.com/uploads/1/3/2/6/132682295/jinubepedowivu_lorut.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/92647713565.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/gizisevew.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/32474292851.pdf
    • https://cdn.shopify.com/s/files/1/0433/0366/5822/files/gesasiteb.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/refraction_of_light_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/telifaxumetari.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/nedabaximiwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/kms_urban_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/24306756377.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/piwiriwofiguludisenili.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_off000060dd.bin
4dd3f75c299958b4a2a6e20ce9f8e6422f7e6a07bcd637342e6aab477fefd761
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 5680 bytes
font_01_sfnt_off00007453.bin
e99b3ae3fda04e6dfb9f64c04c67368d008ec9560b4664c56b03d7475980ddef
pdf-font-stream PDF embedded font (sfnt) at offset 0x7453 10132 bytes