Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0a0859f1478e2d…

MALICIOUS

PDF

52.1 KB Created: 2020-09-02 03:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 853b9d3d88c66516701d511b590bfe9f SHA-1: 422448151d5f76bb3573da8f098b5ee50de03268 SHA-256: 7a0a0859f1478e2d44c5a9f699fd166f91ad1230297b7821cf11a72408e33332
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, many of which point to a redirector service (ttraff.me) that is known to host malicious content. The document body itself is heavily obfuscated but contains the same redirector URL. The presence of a large number of links suggests a link farm or SEO poisoning attempt, likely to drive traffic to malicious sites.

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.me/pify?keyword=chamma+chamma+song++djking
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3974/4419/files/97797966022.pdf
    • https://cdn.shopify.com/s/files/1/0450/2405/1358/files/delco_radio_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0557/4309/files/321_media_player_classic_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/9594/0519/files/ridenar.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/baal_veer_bhojpuri_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6909/files/17353649993.pdf
    • https://cdn.shopify.com/s/files/1/0464/9127/1320/files/32731688864.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/wogazuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/rikiwufirodomekizifef.pdf
    • https://static.usrfiles.com/ugd/b8c837_991e4aabd90e40d9a871c1730d796e90.pdf
    • https://static.usrfiles.com/ugd/ff2e72_401fef07cff740feba6b8b690bacfca6.pdf
    • https://static.usrfiles.com/ugd/1a89c8_13e7a0901ef54999b23cf2db39c817cd.pdf
    • https://static.usrfiles.com/ugd/ecec20_f5f4b6150b4d40e9af1c16de7a281ce4.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/pizusovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/mitavofisewewigiwa.pdf
    • https://cdn.shopify.com/s/files/1/0461/3796/6745/files/ap_us_history_textbook_american_pageant.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f23.bin
bac9d4c0a1e48420080eab0dc684d2f6b55faadcd3c97e61c57d6cb5e2a9a4e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F23 5272 bytes
font_01_sfnt_off000090eb.bin
4cb3eced19b228c7c533a9493a829438f4440ec51d30e040d3b1e000194df8d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x90EB 15804 bytes