Malicious PDF — malware analysis report

Static analysis result for SHA-256 e347df5335b33230…

MALICIOUS

PDF

39.0 KB Created: 2020-08-20 21:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 242f7ba2d3da9add247483350a1f8ba3 SHA-1: 84a69d116a835a28b8e6f236f7f4652363496ef5 SHA-256: e347df5335b3323050bb10b9d96a7653cc4e9d71697d0d14ae8d66b8bb4c92f8
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a large number of embedded links, many pointing to external PDFs, suggesting an SEO manipulation or link farm tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The document body contains a URL that appears to be the primary lure, directing users to a potentially malicious site.

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=story+map+printable+template
    • http://newekine.trekking-romania.net/uploads/1/3/0/8/130814017/36a98.pdf
    • http://files.cbt5th.com/uploads/1/3/0/7/130738924/kigekolu_vowibulowipevuz.pdf
    • http://files.missionprosthodontics.com/uploads/1/3/1/4/131409693/3416097.pdf
    • https://cdn.shopify.com/s/files/1/0438/3539/2150/files/nefinadosibim.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/convert_kindle_file_to_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/5189/1358/files/sequoia_capital_pitch_deck.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/ronasegezasajizijurupisar.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/basic_architectural_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/74476713532.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/louisiana_state_police_fatal_crash_reports.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/analise_de_dados_e_estatistica_descritiva.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/fekozexedotamivezilekefu.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_off00005c10.bin
5214914f98d6e6524308713a751d5ada92351415cfcfe58c25debba8efad84d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C10 5132 bytes
font_01_sfnt_off00006d67.bin
3d3dd22185626ad37c16cd7a9897f4d32b7db13bff24cfb83b4fc7adda9fe1ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D67 10012 bytes