Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3313cc1e2718b4…

MALICIOUS

PDF

42.8 KB Created: 2020-08-18 13:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd7794452d42a276000cd4a374021743 SHA-1: 7f2da697c28ddd708f43e975c4eb3c2d16d6b901 SHA-256: ba3313cc1e2718b4978d4de6ee09c0320cd19fc9c237066a7151c00a18056377
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The embedded URL 'https://ttraff.cc/pify?keyword=cutting+diet+plan+pdf+female' is a strong indicator of a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to a 'cutting diet plan' and the malicious URL, reinforcing the lure.

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=cutting+diet+plan+pdf+female
    • http://vugajo.edieshattricks.co.uk/uploads/1/3/0/7/130739024/959a9ce24ea.pdf
    • http://mokegob.acupunctureonsaltspring.ca/uploads/1/3/1/4/131438641/7ad50894ee9a.pdf
    • http://xajeki.lscodn.org/uploads/1/3/0/7/130775934/6832752.pdf
    • http://files.lhaconsult.com/uploads/1/3/2/7/132740584/6117257.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/36875823514.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/72229508855.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/sopirifebiwebisaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/csv_to_array_python.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/25641735089.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/77283611841.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/30300844102.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/2045341149.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/acnl_hair_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/verilog_else_if.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_off00006aa1.bin
173c6991747fb575d74dc37476589d792d4497b08ab69b0e5e6ca4660edb3e29
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 4992 bytes
font_01_sfnt_off00007b90.bin
680adba920fc6851be121a42e4cf0d44a9fcf48f931812dfffa21d618b858bb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B90 10300 bytes