Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f00f36a3532cd7d…

MALICIOUS

PDF

44.8 KB Created: 2020-08-24 23:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e28e4224685750e9ccca1ea64e35222 SHA-1: ce38204030a003a6c9022200267f56b0a6f6aa38 SHA-256: 1f00f36a3532cd7df9d94aa01af69c04ad0ec1fe2fc25df03ba761fb45ee32c0
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=cahier+de+planification+enseignant+pdf'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the suspicious URL, reinforcing the phishing or scam lure.

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=cahier+de+planification+enseignant+pdf
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdf
    • http://jalaf.mmarksmassage.com/uploads/1/3/2/7/132740609/jurisunexon.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/18065490108.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/66612965411.pdf
    • https://cdn.shopify.com/s/files/1/0436/1161/9491/files/65920762026.pdf
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/daturoxajebug.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/select_col8_1_from_1yqcjjcml9hryi_dk-_py55fmwzkttiq2wa1l5lies.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/xasawitaburinilurapik.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/76907637753.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/movod.pdf
    • https://cdn.shopify.com/s/files/1/0438/7844/9307/files/lagu_surah_al_kahfi_muzammil_hasballah.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/dryer_sheets_inside_shoes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/37467638560.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_off000063cc.bin
b648292d2351099847492f8be480bdb98ec05eb9d1c3e74351e9319c4983be06
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CC 5320 bytes
font_01_sfnt_off000075dd.bin
bf34473def3db73f2b8849483b4e9900301fffc6c44df8344ac6756cbea30385
pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 15464 bytes