Malicious PDF — malware analysis report

Static analysis result for SHA-256 30663e87e2dc4847…

MALICIOUS

PDF

41.1 KB Created: 2020-08-01 10:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8b35a7f59ef5a00a173e1151b162eba SHA-1: f003774eb6827ad1e5911d227d78f8c32b7f1a84 SHA-256: 30663e87e2dc4847c2993039ecf0fa669d464d1f2d6fb15fbd73f2ce495f3191
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 'https://ttraff.cc/pify?keyword=javascript+remove+element+from+array'. This indicates the document is designed to lure users to malicious infrastructure. Additionally, the PDF hosts a large number of external links, many to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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=javascript+remove+element+from+array
    • http://files.goshenmechanical.com/uploads/1/3/2/6/132696171/9497673.pdf
    • http://files.icuesociety.com/uploads/1/3/0/7/130775596/ce4c0c2aabb9.pdf
    • http://files.norcalpomeranians.com/uploads/1/3/2/3/132303353/8b8e9e57.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/craigslist_ie_jobs.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/76886289760.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/39776597769.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/28520069408.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/87512930164.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/rusegegipeforijavegozot.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/61064264550.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesibilefonupas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/53469921488.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/89489230551.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_off0000631f.bin
0eaa9ad43ba89d886e33c1e1367bb7847822737b97aaa4018e5992f98a9a18e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 5312 bytes
font_01_sfnt_off00007536.bin
1740f5fad1d2fc5e0c1320034d177467afcb45830d1cfc7782e78e7ecfdf9c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7536 10112 bytes