Malicious PDF — malware analysis report

Static analysis result for SHA-256 4446d721af39a138…

MALICIOUS

PDF

43.3 KB Created: 2020-08-08 14:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc2d759911b1c8bac35a697f4f849f21 SHA-1: 2067892bc693b533f4f05a6d2a30b1acebd487fb SHA-256: 4446d721af39a13826d89b30a5c21fef307757bbca345df0f52fded3a6831848
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the text 'Soluciones para el cambio climatico pdf' and the malicious URL, suggesting a lure to trick users into clicking on potentially harmful links. The ML classifier strongly indicates maliciousness, and the presence of a redirector link points to a phishing or malware distribution attempt.

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=soluciones+para+el+cambio+climatico+pdf
    • http://files.infinitydesignjewelry.com/uploads/1/3/2/6/132682802/6a1dfe.pdf
    • http://bekewaw.vliegendestoel.nl/uploads/1/3/1/4/131437792/zozunuvakopavijilup.pdf
    • http://files.ayumialdina.com/uploads/1/3/1/4/131406140/5218818.pdf
    • http://files.besticandib.com/uploads/1/3/1/3/131397934/f35c1ba1d.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/92229639442.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/lifubofufopadodil.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/71476341651.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/riwuvizarakogafobadabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/fovovugunebugidebodube.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lezoxaxus.pdf
    • https://cdn.shopify.com/s/files/1/0432/0831/0943/files/94822385892.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zebegevuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/76817367350.pdf
    • https://cdn.shopify.com/s/files/1/0428/8793/8211/files/soguzujukijasugokojuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/antenna_theory_analysis_and_design_free_download.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_off00006671.bin
52795de2d5c5398914007d653b3b303637d50d0286c8801db6d253ce1beeb98d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6671 5544 bytes
font_01_sfnt_off0000792c.bin
c9631f5615476af134d56a41d6082e2441593aa669c6df7220611591169058b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 11764 bytes