Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb99e653000e456…

MALICIOUS

PDF

57.0 KB Created: 2020-09-04 22:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41a2ee9d9e7441d1450dec809cac567e SHA-1: 9a0bb4f4c428a793fc619bc78ce290d3eb97b576 SHA-256: 1fb99e653000e456edb65d830816c8fbab08c8e4e2f08f3a34c2e1977062e52e
128 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, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=video+mpya+bongo+fleva+2019
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/political_map_of_world_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/addicted_to_sugar_article_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/cara_membuat_cv_ke.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/old_coke_machine.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/xaximoseb.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/bayes_probability_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/late_homework_pass_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/bawejulagekowiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/ielts_listening_recent_actual_tests_volume_2_audio.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/gorovawek.pdf
    • https://static.usrfiles.com/ugd/769f78_3318504a7fa7452c82322ff3bb50d256.pdf
    • https://static.usrfiles.com/ugd/882da0_9dc84690254e4b9e82a44a5fa94eaf00.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_off000096aa.bin
86be365ac75729063794420bb40b0dea2d1809d933bf9189a09f5f239e046313
pdf-font-stream PDF embedded font (sfnt) at offset 0x96AA 5836 bytes
font_01_sfnt_off0000aa88.bin
38ff5b8cfb1cf025ee3dffe65b4819d9cb172da91248e9f65c66de214e0ccbf1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA88 1624 bytes
font_02_sfnt_off0000b2bc.bin
c39473109f3f83fee805c48c12bd75ebadbd1241c85b72aa8c505dc52a541f97
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BC 10668 bytes