Malicious PDF — malware analysis report

Static analysis result for SHA-256 004df4f86973cf9b…

MALICIOUS

PDF

38.9 KB Created: 2020-07-31 19:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 451445222c07a7d45246aea2d1f76f9c SHA-1: c5505a9b216244e64e6e22d91b6e10d4318adaf9 SHA-256: 004df4f86973cf9b4b046718af5a1863708d6d3d64c4b5f8bb6cdfc6d1c75a02
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector at 'https://ttraff.com/pify?keyword=3+point+hitch+backhoe'. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness.

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=3+point+hitch+backhoe
    • http://files.playmake-believe.com/uploads/1/3/0/7/130776483/558843.pdf
    • http://files.apronstringsllc.com/uploads/1/3/0/7/130739214/widaleb.pdf
    • http://files.mariogovorchin.com/uploads/1/3/1/4/131413550/3129a88e14a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/34424554807.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/43890682180.pdf
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/fotisokupiver.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/lofatulaxalutegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/farapejokuwisovunemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/93047014959.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/92069792787.pdf
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/84537392332.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/36136151127.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/38325680126.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/58330887225.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000554d.bin
9a7e0fa24cc525092b6ce22fb3e5406eed44b08e9bfbce53d28413c8e1a1d240
pdf-font-stream PDF embedded font (sfnt) at offset 0x554D 4988 bytes
font_01_sfnt_off00006644.bin
a738a149f8d464f755779eb29deaa3fb3c5b86f97717d7d43d21908f76baf5d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6644 13032 bytes