Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a19321ab38773f…

MALICIOUS

PDF

33.5 KB Created: 2020-08-22 03:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c959bda5780c98af00b9739e82e20f19 SHA-1: 78c863286fcaa12278796f5bb97abd1c924debdd SHA-256: a7a19321ab38773fae429398f96fee2d1dd110afba45a6cdb9b0b346266fad6d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=baaghi+2016+full+movie++bluray'. The document body also contains this URL, suggesting the primary purpose is to lure users to malicious sites, potentially for phishing or malware downloads. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=baaghi+2016+full+movie++bluray
    • http://benesu.nancylemke.com/uploads/1/3/0/7/130776585/9219161.pdf
    • http://files.shellfishermen.org/uploads/1/3/1/8/131871618/nimopotiwot_fitex_nijofojepo_taverixinakera.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/38442792030.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7037/files/kozufinotagizafowesunoxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/main_hoon_bodyguard_south_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/buchungsstze_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0440/5608/4630/files/taxulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/42075195499.pdf
    • https://cdn.shopify.com/s/files/1/0433/9787/3831/files/kevexiwixobofinepumifamux.pdf
    • https://cdn.shopify.com/s/files/1/0438/1966/3517/files/kenejasarujir.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/kshatriya_songs_ming.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/67293188036.pdf
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/85218453433.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_off00004372.bin
d6c7667195517e975ff96fde7077ce22449ea7224ecd9ab86bdc738b6714d937
pdf-font-stream PDF embedded font (sfnt) at offset 0x4372 5836 bytes
font_01_sfnt_off00005742.bin
65bfe0b2c17b6e926696db5bdaecdaefd67dcbcac889df3aa4c4b161015c9f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5742 9916 bytes