Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef1ad6783ede52f…

MALICIOUS

PDF

47.8 KB Created: 2020-08-08 05:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdf600f93f551f445d31e76b94ef3edb SHA-1: a1492fa1b6254805240770fb0b0162eb844e1c2b SHA-256: eef1ad6783ede52f36a5f4ff493ff3d72d34cc2fbf97137a2da32a6deece7b12
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link: Malicious File

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm designed to obscure the ultimate destination. The primary malicious URL is likely used to redirect users 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.cc/pify?keyword=car+maintenance+checklist+pdf
    • http://files.multifloraplants.com/uploads/1/3/1/4/131437983/jipulifetinu.pdf
    • http://files.apollopresby.org/uploads/1/3/0/7/130740180/3f53e4a.pdf
    • http://files.texasdispro.com/uploads/1/3/2/6/132681863/vukizi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/perireja.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/99887406137.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/buenos_y_malos_habitos_alimenticios.pdf
    • https://cdn.shopify.com/s/files/1/0454/5576/9758/files/2020_may_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/23539303709.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/9010986253.pdf
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/mesavugujofofuxodegofevug.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/34109803071.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/16620758447.pdf
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/39131522115.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071d3.bin
e0e11cbc1ca673363de31ce10d10be3e6c8d838fb5270f833360b7ecb6db3f0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D3 5160 bytes
font_01_sfnt_off0000832d.bin
60de0d80dc287c72c6db47c51e54de240249b9b9bf7ca4f110bf41305097c0a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x832D 9856 bytes
font_02_sfnt_off0000a4b6.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B6 4324 bytes