Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03dcc91fc13200b…

MALICIOUS

PDF

38.6 KB Created: 2020-08-20 20:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3f83d48f95b7557fc049a5b7ca049a7 SHA-1: 6480eacb1a797eb903b53291957dc83f6a91adb8 SHA-256: f03dcc91fc13200b6b94b27715ecc457b0dae9386609815a8816c8e7b69fa08f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though obfuscated, contains the malicious URL and references to sheet music, likely a lure. The ML classifier strongly supports the malicious verdict. The primary attack vector appears to be directing users to the ttraff.com redirector.

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=somewhere+west+side+story+sheet+music+free
    • http://litenu.cranechuanfa.com/uploads/1/3/1/4/131409236/3798648.pdf
    • http://files.stonerstakeover.com/uploads/1/3/1/3/131379530/fafuko_jifatigefoxa_sarabopaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9478/4665/files/vodosebuseviniv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/bsa_camping_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/xixarikotikurifej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/gafigagurofuzu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7680/2967/files/tigesuve.pdf
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/76342547943.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/vapozi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/kitid.pdf
    • https://cdn.shopify.com/s/files/1/0453/6372/4443/files/17879888369.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/free_advanced_excel_training_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004aa1.bin
44343dd0955677bd6408cbbe475b923b0d1b779dd39a4c9dd8eb561ed6ff2c0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA1 5092 bytes
font_01_sfnt_off00005c08.bin
8bb7c4d6c01c882c6252d4868c18b2492a1473772c967e45badfb865fe110032
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C08 10364 bytes
font_02_sfnt_off00007f92.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F92 4324 bytes