Malicious PDF — malware analysis report

Static analysis result for SHA-256 9967571180bc733a…

MALICIOUS

PDF

49.0 KB Created: 2020-08-17 13:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d245163b4be90edd2b99461c89c48835 SHA-1: 57565968a030324ee0bdbd6ae3691a6ae296aac1 SHA-256: 9967571180bc733af2c4496d79342166af38fc49b6c4e50ca924067000294c9f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting the intent is to lure the user to a compromised 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.ru/pify?keyword=national+geographic+water+our+thirsty+world+pdf
    • http://files.rachelannsaylor.com/uploads/1/3/0/8/130874655/8898312.pdf
    • http://zemobarex.westeramstel.com/uploads/1/3/1/0/131070450/4684787.pdf
    • http://files.purplesparklefoundation.org/uploads/1/3/0/7/130739744/vamapezotomig.pdf
    • http://files.womenwithapurposemin.com/uploads/1/3/0/8/130874328/rorumuropowawak.pdf
    • http://ropotetor.lake-n-golf.com/uploads/1/3/1/4/131454415/254790.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/nejaxijoku.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/roguwemuwodavujobex.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/32131628834.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/69567896259.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/veronica_netflix_english_audio.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/health_economics_charles_phelps.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/72258159827.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/49335958050.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9968/files/difference_between_broadside_array_and_endfire_array.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/wexisibipebifafafuju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007267.bin
58aa8c5f69ea914793da101762587ceae65d53bc3750830e3163b78ca561c936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 5460 bytes
font_01_sfnt_off00008505.bin
ba7372d2ba5493c8e3f62524bfae729ae72e57885f6051613d9456a8c2225d09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8505 10504 bytes
font_02_sfnt_off0000a8dd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8DD 4324 bytes

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