Malicious PDF — malware analysis report

Static analysis result for SHA-256 414b72334132b88c…

MALICIOUS

PDF

97.5 KB Created: 2020-08-22 20:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc7c45fb9cf258e719ce8d14ff32632a SHA-1: 32f598fe7404b72e70dc982d3e2e8b7e888ab422 SHA-256: 414b72334132b88c8bd9b251d17e75887a241ba76500261a8c1804114cf59ae9
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com. This is further supported by heuristics indicating a malicious redirector link and a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains the text 'Medical terminology list pdf' and the malicious URL, suggesting a lure to trick users into clicking the link.

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=medical+terminology+list+pdf
    • http://files.mlkswim.com/uploads/1/3/2/6/132695865/rabipix.pdf
    • http://files.symphonicplays.com/uploads/1/3/0/8/130874257/331490.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/56076231727.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/waxov.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/become_better_you_joel_osteen.pdf
    • https://cdn.shopify.com/s/files/1/0429/1235/0367/files/xudonewusuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4432/files/prostate_cancer_causes.pdf
    • https://cdn.shopify.com/s/files/1/0444/6869/9303/files/72865420499.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/levuxuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/33200987390.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_off000123ac.bin
896058658af7b8d16dd9d4bec79287e6af6677c25dc2dc4bba2902de19c9f2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123AC 5580 bytes
font_01_sfnt_off0001369c.bin
7805346c99c2062eaca5604bab3d67f4e9476e3c0d3b3dc131c9b270d700c04b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1369C 27296 bytes

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