Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b714bf87f2cf45…

MALICIOUS

PDF

46.6 KB Created: 2020-08-06 05:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbd35141e69e83726328c7633c32e611 SHA-1: a8c5eb7014a2f9d457284427d303c712acb9cc6b SHA-256: 35b714bf87f2cf456037768b841ed9d7928961ae191938b48dcaec343fd9ba25
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=adjective+clause+reduction+pdf', which is also flagged by heuristics as a malicious redirector. This suggests the PDF is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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=adjective+clause+reduction+pdf
    • http://files.cocinamilonga.com/uploads/1/3/1/8/131856234/7265885.pdf
    • http://files.edmundmichielaw.com/uploads/1/3/0/8/130873804/xizozirim.pdf
    • http://files.codemahek.com/uploads/1/3/0/9/130969148/felukurekera-wejolanoj-jakujadu-jevibibedezenuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/29078164593.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/9543895973.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/pathfinder_advanced_class_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/46782269268.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/98502142646.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/22866046626.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/7398422767.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/tilekokobuzu.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/34570948186.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/zojejexibobomad.pdf
    • https://cdn.shopify.com/s/files/1/0433/7490/3452/files/63913429018.pdf
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/zetuduwunonujan.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/98429543695.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_off00006262.bin
e8ea757e274f090fa6136a59bee309b71f7b5458295a271675037d24db7b7162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 5276 bytes
font_01_sfnt_off0000746f.bin
30d74b995ef0299726c11807acd89a8a24c8611c56db2cec7347f05cd9e5d652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746F 10040 bytes
font_02_sfnt_off000096ea.bin
bb77be7d648703f331a62eb3ae9d62c75f002e0868d7ab643a842db85d879866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96EA 16412 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.