Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca2ae0a0a570b82…

MALICIOUS

PDF

44.7 KB Created: 2020-09-02 18:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa60bad32f3b513e019d259512aa00cb SHA-1: d3c55c6c6a11716a2cdb0d48bbb7434cd257e4dd SHA-256: eca2ae0a0a570b828ae8e681188b85970df7d0ddbfc54873685926a44c3bbf5f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains the text 'Angaaray book pdf' and the malicious URL, suggesting a lure to download or view a document. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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=angaaray+book+pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/sebikewusilifitilad.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/house_rent_agreement_format_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/dependent_clause_and_independent_clause_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/zanowovixokatarajosa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/podilebubise.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/empyrean_restoration_effort_destiny_2.pdf
    • https://static.usrfiles.com/ugd/3b47cb_5a7b2d2f348746d592616e21e4201578.pdf
    • https://static.usrfiles.com/ugd/b8c837_c91f7b46b6004e72a4e186cd9e11a7bd.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/volekexobebimazitinilojuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/liboviradizovozadu.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_off00005ba5.bin
32e5452ee9f3da59c0fd72861186a6399e1a6e6750fb5f632e581835b745dc19
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA5 5292 bytes
font_01_sfnt_off00006dc6.bin
680fa2f826f41873a25123cb4e5e861dfa6925f01e85d2e5e62a5b109167d258
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 10204 bytes
font_02_sfnt_off000090e3.bin
de91570f50a7136400fd5d30b4225c4730c732b85b2cfea4c1cc5eeed8664338
pdf-font-stream PDF embedded font (sfnt) at offset 0x90E3 16284 bytes