Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe8aeaa0444fdee…

MALICIOUS

PDF

35.2 KB Created: 2020-09-10 06:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16ced80e761eb3e9c128a64495e8f89b SHA-1: f7c2e5a3127ff90a3de9b0dd1f9d89dcb47d47fb SHA-256: afe8aeaa0444fdee72bbe834550478ed5d61b384863b29af54b09926d2c4fcdf
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.club', suggesting a phishing or scam lure. The document body, though heavily obfuscated, contains the same URL and keywords related to claims reporting, reinforcing the phishing pretext. 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.club/wix?keyword=icw+group+claims+reporting
    • http://baraf.christieriehl.com/uploads/1/3/1/4/131438096/felezin.pdf
    • http://resiferim.allsaintshighwycombe.org/uploads/1/3/0/7/130776819/lupane_wepomegijumev_nolab_kukawez.pdf
    • http://tadul.teamspiritcheerleading.com/uploads/1/3/0/7/130739935/584a030f.pdf
    • http://files.thegardenicearena.com/uploads/1/3/1/0/131070722/4687144.pdf
    • http://files.jrhewson.com/uploads/1/3/1/3/131398222/05a3d550.pdf
    • http://files.maplehillbluegrass.com/uploads/1/3/0/8/130814830/rubuzesefogonegudeva.pdf
    • https://static.usrfiles.com/ugd/e1c37d_936a41cce66f4455ba6644de527caae0.pdf
    • https://static.usrfiles.com/ugd/948cea_0aba135302a3498c90834d2a35e40ac1.pdf
    • https://static.usrfiles.com/ugd/865d50_0c95c9c32e8a4f47a6030111b52c991b.pdf
    • https://static.usrfiles.com/ugd/b85eb0_59c9397c1b46458888d42c421bc1358d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d38ddbb468934632b2c0b4658c6776b2.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_off00004aa3.bin
1be8637a5f2d6ead73c03bf9051853bb4f3514f9f09eba6713559e093c42e104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA3 5280 bytes
font_01_sfnt_off00005c9d.bin
481f7a38beb733cf9c4690b1a37e73e697b34e0e81b77817c3b9978668eb8aeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9D 10384 bytes

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