Malicious PDF — malware analysis report

Static analysis result for SHA-256 3496a9e6b92819a0…

MALICIOUS

PDF

40.6 KB Created: 2020-08-27 22:40:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9928dafcc04f9fc3c7d779cec5ede2bc SHA-1: 39cc0104ea46b5ea5697c189e6af2f9f7e20bc0f SHA-256: 3496a9e6b92819a0f25e71b6e3c4ae04354ee11b788b44130e2ffc7c7ea6f11a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=rpg+maker+sex+games'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains references to the malicious URL and other embedded links, suggesting a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=rpg+maker+sex+games
    • http://fisojube.merrifieldseminar.com/uploads/1/3/1/3/131398455/b93cd56ae3681d.pdf
    • http://files.enricahandwoven.com/uploads/1/3/1/8/131856703/47a6c9901b.pdf
    • http://vigutenu.goflysoon.com/uploads/1/3/1/6/131607239/lopenukonizu-nenematulogab.pdf
    • http://files.infocenter.sisterlocks.com/uploads/1/3/1/1/131164556/titojaz-pofiwa.pdf
    • http://dokalobe.bellinfischer.de/uploads/1/3/1/0/131070993/mikizutekigumil_jakesosam_notuwajozefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/56943618542.pdf
    • https://cdn.shopify.com/s/files/1/0437/6920/0791/files/95183057641.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8641/files/mtg_arena_could_not_access_network_location.pdf
    • https://cdn.shopify.com/s/files/1/0462/9073/1169/files/surah_naba.pdf
    • https://cdn.shopify.com/s/files/1/0438/3057/5266/files/81601781982.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/6410657268.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/85677124477.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/british_parliament_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/41148550093.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/pigutogovotom.pdf
    • https://cdn.shopify.com/s/files/1/0464/2753/7560/files/hummer_h3_repair_manual.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_off00006167.bin
a7252daa1336ef65c44cd11fe6f14f1498f554d66772c338a4c8322f584a5ea3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 5248 bytes
font_01_sfnt_off0000733b.bin
a37c3439627ffd100e74b57168cd5c3eb35f8505352697d25fb3d51f07ddd832
pdf-font-stream PDF embedded font (sfnt) at offset 0x733B 10120 bytes