Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee70d43e65789ea7…

MALICIOUS

PDF

42.6 KB Created: 2020-08-03 14:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 355d2dfae0f98cfbebe7a9e5ff67694b SHA-1: ae42384fecf80b21cc494811de77e40ffa0233f6 SHA-256: ee70d43e65789ea7bde6dc34be8e1dfbca38efb865145496144761f445818d43
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.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the primary malicious URL, indicating a likely phishing or malware delivery attempt.

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=klaudikasio+arteri+pdf
    • http://files.westonathletics.net/uploads/1/3/0/9/130969204/vovelokefozidedura.pdf
    • http://files.crescentandstone.com/uploads/1/3/1/4/131438069/napenamuna.pdf
    • http://files.judelab.com/uploads/1/3/1/3/131380771/08912831c5.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/61282453026.pdf
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/fivaviruxosiguse.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/jabavasab.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/tijegezabedesimeniz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/15191573921.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/niwiponuzizigujikal.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/pokemon_zeta_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6670/files/wunixupusawewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/22308914266.pdf
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/fupafoxap.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/benabozebutot.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_off000068e9.bin
ae4b8f099940819ca371d09b5753c27a71b6abb84e1fdfa468e47e24d9700c24
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E9 5068 bytes
font_01_sfnt_off00007a37.bin
33b5304adf3434f83fd3765c7c78e10282d89915a1d82e029879e669234f2a1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A37 10404 bytes