Malicious PDF — malware analysis report

Static analysis result for SHA-256 b197c60dbf5cd7bd…

MALICIOUS

PDF

39.6 KB Created: 2020-07-24 23:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 337334d741527b41104cd8882b2d49ab SHA-1: 80d1f278bfe430d53db9655c4aa91bc5b2b85fcd SHA-256: b197c60dbf5cd7bd54bf063c720d5251d9bbeb37ad0f80e8d32eae622c882669
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning model and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a large number of external PDF links, a common tactic for SEO manipulation or distributing further malicious content. The primary malicious URL identified is ttraff.com, which is used in a redirector scheme.

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=imsva+configuration+guide
    • http://files.mudlarktheatre.com.au/uploads/1/3/1/3/131383998/vefif-vazikirepu-ruwajiwul-rebedutir.pdf
    • http://files.gcamp.org/uploads/1/3/1/3/131379042/fibiruxene.pdf
    • http://files.jesslandequestrian.com/uploads/1/3/0/7/130739918/5280386.pdf
    • http://files.paloaltoclub.org/uploads/1/3/1/6/131636601/1e97135c4.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/60436944909.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/26139734695.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/waxigulazatep.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6296/files/bufamevazejedutesuzofilum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/junubetozon.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/tijazugumasivorovokix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32852202686.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/2207194636.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gadawatozuwagujezudoru.pdf
    • https://cdn.shopify.com/s/files/1/0428/5598/9404/files/76261045308.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/fawagabukax.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005daa.bin
48a5114a4d4e3a60a5489537b3e20346cefbfecb027e513ee03f749ecc6c8754
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAA 5188 bytes
font_01_sfnt_off00006f2e.bin
c6da52c1ef5aae9a3dbea3cb4525f7eb95ce4548a4cde6fca0b9b94cf1909b1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2E 10040 bytes