Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba49d22bfe9ae9fa…

MALICIOUS

PDF

41.9 KB Created: 2020-08-04 11:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e584fd5d2ab2294e686d3ef823f1ec59 SHA-1: e66f265ed723328f9692693ddcee908901159377 SHA-256: ba49d22bfe9ae9fab4b210b0e4c4b5a6ceaa7c606d231dae5eebc839649f63bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The primary malicious URL identified is https://ttraff.com/pify?keyword=dysfonction+de+l+articulation+temporo+mandibulaire+pdf, suggesting a potential redirection to a phishing or malware distribution site.

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=dysfonction+de+l+articulation+temporo+mandibulaire+pdf
    • http://files.historianstevecampbell.com/uploads/1/3/1/4/131453068/bc85c4ded5f.pdf
    • http://files.xpdasoccer.com/uploads/1/3/2/8/132815342/4fe010511a3.pdf
    • http://files.vkdistributors.co.za/uploads/1/3/1/6/131637606/vuxifedozagoso.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/festivos_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/10992538119.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/17260573627.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/cooking_with_tangyoon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3040/files/levuruduv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/jazasujibumovego.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/gimeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/77785111089.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/35521672975.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/1290786041.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/12910289150.pdf
    • https://cdn.shopify.com/s/files/1/0428/8453/0343/files/raspberry_pi_install_python_3._6.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/wrist_arthritis_exercises.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_off00006424.bin
d4da87bb216f4a0e770978b0f01264cc81d3c012bf4639408689d83cca6baa7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 5540 bytes
font_01_sfnt_off000076f1.bin
fdad45ceccb778e2ec53f1e48a47d0dc62241b015f3eaccb9fd7fc4683bb1bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F1 10328 bytes

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