Malicious PDF — malware analysis report

Static analysis result for SHA-256 56983bad9e788171…

MALICIOUS

PDF

53.1 KB Created: 2020-08-11 17:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19d6278023d8daf4f9c4979fa0dcc685 SHA-1: 8626e43984723d454de8450c9a15b607c3efabbd SHA-256: 56983bad9e7881718f106984ea67923c45b23d89338141736ecb58ab49dd434d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link `https://ttraff.com/pify?keyword=carnatic+music+book+pdf` identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to this lure. The ML classifier strongly indicated maliciousness, and the presence of a redirector link suggests the intent is to lead the user to a harmful site, likely for credential harvesting or malware delivery.

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=carnatic+music+book+pdf
    • http://files.logos2gogo.com/uploads/1/3/1/1/131164251/tuwaf-buleveritedi.pdf
    • http://files.nativenerds.org/uploads/1/3/0/8/130874115/xokuveneb.pdf
    • http://files.midsomersetmartialarts.com/uploads/1/3/1/8/131856186/e4681535.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/xavebubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/vifob.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/lipigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/xujojux.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/assembly_drawing_solidworks.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/jefekes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/bijotorujofotedurekus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/archidoxes_magica.pdf
    • https://cdn.shopify.com/s/files/1/0432/4851/7275/files/employment_verification_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/kupije.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/risk_management_in_commercial_banks.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1129/files/5e_player_s_handbook_color.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_off00009281.bin
9335fb571474daeb615286de3451a5ae95c98b0c5dde9d9d44ca0fc9a86aed3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9281 5376 bytes
font_01_sfnt_off0000a4a7.bin
9079422f9ca4d73936a2e43a549b9819ffa228f455f4daad5b57caff3443ba45
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A7 10212 bytes