Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0591cbe9b088c50…

MALICIOUS

PDF

35.3 KB Created: 2020-08-19 05:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35024080c770b36e195d1ea71b0f9dd1 SHA-1: b6d63395ed5a93a08bbed6ff8d7375cb4421dc1c SHA-256: f0591cbe9b088c50934f7c63fccc574dc5099130c5f340ac58be869b1477e6be
152 Risk Score

Malware Insights

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

The PDF file 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 Shopify. The document body, though heavily obfuscated, also contains the malicious redirector URL. The primary attack pattern involves luring the user to click on the malicious link, which then redirects to a potentially harmful destination.

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=daru+badnam+kardi+video+song++pagalworld.+com
    • http://files.encoretulare.org/uploads/1/3/1/4/131452750/fofusavij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/1854/3523/files/43433043681.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/mcdonalds_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/levigibujedenuxemutek.pdf
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/95101216032.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/pasitod.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/molulisoxax.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9470/files/healing_code.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/55486273894.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/31751146914.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_off00003ecd.bin
0b0f1f4cf6072d73c0bf9bfe0c6754cc54a818b266bd4bf104417dd969e33b41
pdf-font-stream PDF embedded font (sfnt) at offset 0x3ECD 5584 bytes
font_01_sfnt_off000051b6.bin
0fa5eb5724888330b24a4eda60dc7123d7a8f03890bb8203e36bf9dca4d0a486
pdf-font-stream PDF embedded font (sfnt) at offset 0x51B6 9576 bytes
font_02_sfnt_off00007277.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7277 4324 bytes