Malicious PDF — malware analysis report

Static analysis result for SHA-256 1faa324ffd4d93a9…

MALICIOUS

PDF

40.5 KB Created: 2020-08-14 22:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 355dab230e4e1659b6699f760113ea41 SHA-1: ab68faffcc8a7daf7c75858ccdd3ed4b7041f051 SHA-256: 1faa324ffd4d93a9861d4e869c801f540c6ca68230883f03ba50e34bba304838
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be an 'Emitra application form pdf' and includes the malicious URL. This suggests the document is designed to trick users into visiting the redirector, likely leading to further malicious content.

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.ru/pify?keyword=emitra+application+form+pdf
    • http://files.thelight.org/uploads/1/3/1/4/131453894/853564.pdf
    • http://lanofop.abundantlifemedical.com/uploads/1/3/0/7/130739777/redujijasife.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/xozuvebefalirofoxanefevuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/the_alternative_introduction_to_biological_anthropology_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/51041382984.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/fipopelixujeveboruji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/5472566995.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/tavegakonew.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/63163838944.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/81735006691.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/51796961178.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/mefarofuvixove.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7696/files/6305175149.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/soal_cpns_uud_1945_dan_amandemen.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_off0000557a.bin
28d79811d21fda362ea061a9b5ad3c889501a456c227ae5523a2a604a9274575
pdf-font-stream PDF embedded font (sfnt) at offset 0x557A 5080 bytes
font_01_sfnt_off000066a2.bin
33a540d2469ad275f8123215105fdb9f822349c4deb60406c9fe4a1801328257
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 14464 bytes