Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c541d0d2b054de…

MALICIOUS

PDF

46.0 KB Created: 2020-09-07 13:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a742357ab0b8044fa837153ef5a1932 SHA-1: dc05e5c16d329a505ecc589387c38e706e7ac412 SHA-256: 38c541d0d2b054dec023b5f02105d9b00f030e80a3cca1957f71630fe320d656
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, 'https://ttraff.me/pify?keyword=ellie+taylor+mash+report+pregnant', which is flagged as malicious. The document body, though heavily obfuscated, includes this URL and a benign-looking PDF filename, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicates 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.me/pify?keyword=ellie+taylor+mash+report+pregnant
    • https://static.usrfiles.com/ugd/74c34a_bd98fb45770b475cb121a9d25603fa26.pdf
    • https://static.usrfiles.com/ugd/d48fe3_6fb379b895ec4d8e9f2ee1fc12676bd4.pdf
    • https://static.usrfiles.com/ugd/963627_0c8187068f9445868280f4836ba716c9.pdf
    • https://static.usrfiles.com/ugd/20d83a_bfe9e6b9b74844c9a50f76820c157a35.pdf
    • https://cdn.shopify.com/s/files/1/0450/3057/2190/files/alto_professional_ts215.pdf
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/vesaxunizez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/3_on_3_basketball_rules.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/33870134414.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/papilewom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1773/1229/files/le_cercle_de_la_forme_lecourbe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5324/files/verificacion_de_cfdi.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_off00006a95.bin
97560ea701d480278f5160e3bc33b12ae9d8068c721827351261d2cd488cf2c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A95 3184 bytes
font_01_sfnt_off000075ea.bin
002420440182b87465be74fb56be75f20ea6bf3686d09e924b81807c3588fc56
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 5292 bytes
font_02_sfnt_off000087ce.bin
4dd2659697327ab9600c219740c5bdcdc9b9fae0dee4ef47a63dd13d957dc0eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x87CE 10256 bytes