Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bcbac57293e03c…

MALICIOUS

PDF

53.2 KB Created: 2020-09-08 14:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7cf3bec704ed36e807fdb13827cef2a SHA-1: 22d35628cee42c8326adfeff1d70cc7893cd8da1 SHA-256: f7bcbac57293e03c4669606b198c769247c5f86a52d326aeb57331b4c922c8f4
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Canada election platforms compare' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the malicious intent.

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.link/pify?keyword=canada+election+platforms+compare
    • https://static.usrfiles.com/ugd/880a7e_42d915c5c76946b994941927dbd232ea.pdf
    • https://static.usrfiles.com/ugd/756799_295c200fcf8f4b15a31ae152431ac052.pdf
    • https://static.usrfiles.com/ugd/37987b_b3f60ca70f1e4a59b49bd50d7de88f06.pdf
    • https://static.usrfiles.com/ugd/493135_0b815ddec10142c682d0fde146b38a2e.pdf
    • https://static.usrfiles.com/ugd/912de2_62d80f61f0824ec2bd1e6deea1f3455a.pdf
    • https://static.usrfiles.com/ugd/33ab24_aebfabb892c449d282045b3fc577ed27.pdf
    • https://static.usrfiles.com/ugd/ee6100_de8e776c7b004e9c837122f7a651c82b.pdf
    • https://cdn.shopify.com/s/files/1/0436/9527/6187/files/literature_circles_for_middle_school_role_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/terry_stafford_suspicion.pdf
    • https://cdn.shopify.com/s/files/1/0437/0713/8201/files/gofonagulomusam.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/lotevope.pdf
    • https://cdn.shopify.com/s/files/1/0429/7850/8953/files/75834467886.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4701/files/amagami_ss_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/58374122197.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/96077892740.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_off000092d5.bin
3fb2fbc99e7ff8003c3b28082c3fb03fb3b466eddd6624eb26fe2f5e5f0125fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x92D5 5208 bytes
font_01_sfnt_off0000a46f.bin
48e95c439c6818b4e33fe269f0716257413ffb631507a7ba9281e20e3f9c2dcb
pdf-font-stream PDF embedded font (sfnt) at offset 0xA46F 10444 bytes