Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b85bb2516d0190b…

MALICIOUS

PDF

35.6 KB Created: 2020-08-30 10:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e804e06a65a216bd1c5c7159f0bdc6b2 SHA-1: b02671c81df01f482cb04ea4843232532c7a0c53 SHA-256: 9b85bb2516d0190b68e96d409065f27763e4b9faf2f5e49c39ce2c50a65bb6a9
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to redirect users to malicious websites. One of these links, 'https://ttraff.cc/wix?keyword=dod+7000.+14r+volume+7a', is identified as a known malicious redirector. The presence of a large link farm and the malicious redirector strongly suggest a phishing or social engineering attack aimed at directing users to harmful content.

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.cc/wix?keyword=dod+7000.+14r+volume+7a
    • https://cdn.shopify.com/s/files/1/0429/0579/6774/files/zumabexopajozoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/mukugubinamedinosera.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/xilawerolosov.pdf
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/lotronex_prescribing_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/android_activity_appcompatactivity.pdf
    • https://cdn.shopify.com/s/files/1/0434/7206/0573/files/treatment_of_arrhythmias.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/40649682927.pdf
    • https://cdn.shopify.com/s/files/1/0432/2023/8503/files/35700636115.pdf
    • https://static.usrfiles.com/ugd/b8c837_5dc447c103c64fff890dc05c86beb5ae.pdf
    • https://static.usrfiles.com/ugd/63022f_05389e3cb3e1487d893e469438a19664.pdf
    • https://static.usrfiles.com/ugd/314c35_2371a908cb7943b4bd23b9e73e510e6e.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/jasamudafujaduv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/5617288675.pdf
    • https://cdn.shopify.com/s/files/1/0462/6943/1959/files/91445496389.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/92273828912.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/wajeva.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_off000048bf.bin
3544377fa26788d8dfc032a34423d8c27dc67aa10251fd7feed4a755984fd810
pdf-font-stream PDF embedded font (sfnt) at offset 0x48BF 5244 bytes
font_01_sfnt_off00005a98.bin
632cd5c9498d222c96032ed22c9fec584c52e59683222989bd603241abdc2e5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A98 12484 bytes