Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff06a903f261618…

MALICIOUS

PDF

56.0 KB Created: 2020-08-17 05:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d552682f31e59de8ca280ad9d257de33 SHA-1: 2a43224cb264fb2d3716917c107948ce8add01c1 SHA-256: 4ff06a903f261618098479e98918edb9fdaac31669baf36a82bddd252afe55c1
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=pop+flute+sheet+music+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to lure the user to this 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.cc/pify?keyword=pop+flute+sheet+music+free
    • http://xozafo.scoilchaitrionacappamore.com/uploads/1/3/0/8/130874474/temulasagi_femutevepotine_vunuxatoxo_nonewogoli.pdf
    • http://files.alifeworthliving2.org/uploads/1/3/0/8/130874318/lenalaw-fowez-legojumafixixin-tunotababivofen.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/zetepimopezirupagunu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/case_files_neurology_3rd.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/31864722219.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/71208413031.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/red_chinchompa_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/minor_blood_groups.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/vixilapemovamono.pdf
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/gajoxufigidaruza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2301/files/cancer_de_pancreas_sintomas.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d19.bin
c9c925b593ebe3ba7e1f413ba2af9dcdec55520ad2d6c1b71b969bad1bda145c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D19 4824 bytes
font_01_sfnt_off00008d82.bin
68efdac457a955139c1d398dbb8bdee6fbd442b0f2f0165836198dc8d800ca2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D82 9988 bytes
font_02_sfnt_off0000b00d.bin
b330339415d7fa9c1b652c1fb2a052ec06569061b7b71506ab53161dc9b94742		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB00D 16100 bytes
font_03_sfnt_off0000c4db.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DB 4324 bytes

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