Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5688c42d174526…

MALICIOUS

PDF

38.9 KB Created: 2020-09-03 08:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 981c75d84c057bf3977c9ecfe99a1684 SHA-1: 64221bd747ff8c9d1aa96cc3c19c90368633aae5 SHA-256: 2b5688c42d17452676e2e60e4e6cb097dc3fd5d73a300fe69c7b37e0d669a8f0
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a large number of external links, a technique often used for SEO poisoning or to distribute malware. One of the embedded URLs, 'https://ttraff.cc/wix?keyword=apple+airport+time+machine+manual', is identified as a malicious redirector. The document body contains garbled text but also includes the same URLs found in the heuristics, reinforcing the link-farming and redirection attack pattern.

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.cc/wix?keyword=apple+airport+time+machine+manual
    • https://cdn.shopify.com/s/files/1/0437/1188/9576/files/jafikufoxumilubun.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2952/files/sopodapebexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/29160060989.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/13827116241.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2323/files/vemafufa.pdf
    • https://cdn.shopify.com/s/files/1/0463/1468/4578/files/film_benyamin_ratu_amplop.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/gbf_hector_solo_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_07840ca1bf734c56adf1ec0a5d14d843.pdf
    • https://static.usrfiles.com/ugd/2f7815_80372986ce2645fe8116edfc5c6c242a.pdf
    • https://static.usrfiles.com/ugd/bb13a2_d33fc51ad4b645f2a7ef75c760d87063.pdf
    • https://static.usrfiles.com/ugd/d78803_005ba72b9bff4a3f9e6c793370d5842b.pdf
    • https://static.usrfiles.com/ugd/4bb894_9300455db1c4457a9b5645371932538e.pdf
    • https://cdn.shopify.com/s/files/1/0438/4843/3829/files/algebra_2_common_core_textbook_holt_mcdougal.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/best_car_diagnostic_software_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/6549/2127/files/calidad_total.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4229/files/sims_4_extreme_violence_mod_animations.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_off00004e8e.bin
97e0e3f304e67c9559731f6e16f09e8466dcd2fa13504020530b080482e78d65
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8E 4868 bytes
font_01_sfnt_off00005ee7.bin
d0a992417b3e699382f8407659acdacea13f07321615dbe8a995eb6d2556f531
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE7 10132 bytes
font_02_sfnt_off000080b0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x80B0 4324 bytes