Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a891fb645da3c0f…

MALICIOUS

PDF

415.9 KB Created: 2020-09-07 03:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76d4362ae53d3cd82b019b659ba10eb9 SHA-1: 1e3d1c853a35337fb77dd79678c8443d4e4222a0 SHA-256: 5a891fb645da3c0f484dbdabb5354d7e3f55944a03607635350f23409ac77cc8
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector infrastructure. The embedded URL, https://ttraff.cc/pify?keyword=5e+goblin+volo%2527+s+guide, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of a malicious redirector strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • 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.cc/pify?keyword=5e+goblin+volo%2527+s+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/409ca8_5c131b787cdb4835b7ba11fa2a44bf64.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c6cbe1d631246d2b27c5c00f0925dff.pdf
    • https://static.usrfiles.com/ugd/cd79e3_0519c1be64a848edaa63aaf98c710972.pdf
    • https://static.usrfiles.com/ugd/73c254_992efaa50c0e49788e8f024bb3c698e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_56a55d44d62a4731ad5ed01b4f256b52.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/52566312273.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/vumozito.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/tabuwebedejinorerus.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/jiketivolufirokuxogupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/56017771868.pdf
    • https://cdn.shopify.com/s/files/1/0435/6587/5359/files/76353796671.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/anita_moorjani_dying_to_be_me_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8437/3409/files/cambridge_dictionary_free_for_pc_softonic.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/lactation_station_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/31370848810.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/1355755596.pdf
    • https://cdn.shopify.com/s/files/1/0434/8080/9625/files/4624730929.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_off00063175.bin
e299ea68243365b7174d19bb5a50ca77a8195760dd76033e637a1e60ce7b92b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x63175 4948 bytes
font_01_sfnt_off0006426c.bin
8a60f6580c8c6570bccc79197812b7bf3fb989df87cf758cc3012af6659fa435
pdf-font-stream PDF embedded font (sfnt) at offset 0x6426C 14676 bytes