Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52883135a4cb8f5…

MALICIOUS

PDF

54.3 KB Created: 2020-09-13 02:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ab582610b95f4d3626b3f7546f92ae4 SHA-1: bef76ef648596be036db303efdbc2ff47372ae1a SHA-256: f52883135a4cb8f586c86325fc81a62f64b2bbc5220660af84ef22275c7913c9
152 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, 'ttraff.club', which is disguised as a streaming link for 'skam france streaming saison 2'. This indicates a phishing or malware distribution attempt. The PDF also hosts a large number of external links, many pointing to 'static.usrfiles.com', suggesting a link farm or redirection infrastructure. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=skam+france+streaming+saison+2
    • https://static.usrfiles.com/ugd/3254bf_cb8b7106efeb4056842fd1e5fc45a7aa.pdf
    • https://static.usrfiles.com/ugd/38eac1_edbd01711d5d47498a82f273d11ea81b.pdf
    • https://static.usrfiles.com/ugd/1df9ea_8dc42ef93bcd4fd4949a88287daa65bb.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_69d4330c793a4fe6a857636458d010ce.pdf
    • https://static.usrfiles.com/ugd/e1a791_9449e4d3cfa44998a51f357f11af8810.pdf
    • https://static.usrfiles.com/ugd/dec231_2e31ff1e8a9d4408a3bcdfff5a930b4d.pdf
    • https://static.usrfiles.com/ugd/5899d5_b0718fc743a64dcfb2cd30bf1c8b7098.pdf
    • https://static.usrfiles.com/ugd/ae15ca_21dad0cfbaec41bc8f847cf136d14b7d.pdf
    • https://static.usrfiles.com/ugd/53cfc7_e8936e1bfc3e4f64b6d1e11f60341b84.pdf
    • https://static.usrfiles.com/ugd/eda9ba_79091447d28f412c858efcf63eb7d0fb.pdf
    • https://static.usrfiles.com/ugd/d4da64_5dc1e61d40f54028a9241eb6d9d301a5.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/fetitap.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/97040226171.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/vibakuxibanafafi.pdf
    • https://cdn.shopify.com/s/files/1/0461/0624/7332/files/71784303733.pdf
    • https://cdn.shopify.com/s/files/1/0462/4642/8823/files/mapabonexuvelowuvixeje.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_off00008b52.bin
c50cc0b22813bc3d4fe011589aedd9e2b066fe4dd83ee8609b24d2389d8350ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B52 5468 bytes
font_01_sfnt_off00009dd9.bin
d84d133f8be175c41a9a30ca74c194ff4552f1bd6589e6972d6457ca5359e694		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD9 1872 bytes
font_02_sfnt_off0000a6c8.bin
309e2fc168ff2802f807792df860fe12b65bf2587be603b62b23c1a6b4708a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C8 11176 bytes

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