Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e786ae207e7553…

MALICIOUS

PDF

47.7 KB Created: 2020-08-31 10:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 237f995d0685f54eafc1f889fb49c1ca SHA-1: 42fa565a1ebb12b6ba500eda65ccb9b0458ddd4f SHA-256: 45e786ae207e7553f075b1ee54117641a41eee29f3f0a1dd3a769d78e58489d1
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The presence of numerous links suggests a link farm or SEO poisoning tactic to attract unsuspecting users. No scripts were extracted from this sample.

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/wix?keyword=digimon+world+dawn+cheats
    • https://static.usrfiles.com/ugd/c8a981_1a37cd8e04514e97a5d19ef9e151921e.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_8fbc4765b24b46e99182ac129e2ef2e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff0917d947c45d19f3b22cda3ddc578.pdf
    • https://static.usrfiles.com/ugd/8cbfce_a5a86da0794b4601893567a33588a125.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/sad_song_status_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6343/files/ipl_2018_kannada_anthem_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/jewuriraz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/capacitors_formulas.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_9ee77d2a5fd1411eadcff54f5da1bde7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8497c47441d402c8d28f739bd74b4d3.pdf
    • https://static.usrfiles.com/ugd/7598fa_d7f8f0a612bf4580976d4005b2c81114.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a0c8d55a448421a8388470bbb5c2218.pdf
    • https://static.usrfiles.com/ugd/f46427_384f03634c5846a9b3de55f563d9e4a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_293e9a8adda444519479fe0f31be8d2a.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_off0000724e.bin
f930e6fcfb96e320b1446850f1f8d6e8748a9041b48432612adc5c435fab2bb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 5444 bytes
font_01_sfnt_off000084b5.bin
bfd674a88e767aa4a596e16025557145147d08aef4deb55b4b5715ee27084287
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B5 14452 bytes