Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93b1c1629f6a20f…

MALICIOUS

PDF

82.2 KB Created: 2020-08-12 05:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1186d3fbe040bb46d37982bf8408a31f SHA-1: a852dc03c79fd98b9f8c62fedbd20b0d38e79166 SHA-256: d93b1c1629f6a20f1937eb4c98a40a75ba831ed4575a3cfcc5c0b047e766bca2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to 'ttraff.ru', identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bavaria+map+pdf', suggesting a lure to a malicious site disguised as a map or encyclopedia.

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.ru/pify?keyword=bavaria+map+pdf
    • http://files.gracefulheartstherapy.com/uploads/1/3/1/8/131856545/zugojotaz_desejov.pdf
    • http://files.zolisconstruction.ca/uploads/1/3/0/8/130874359/93f5dd606.pdf
    • http://files.lbnchurch.com/uploads/1/3/1/3/131380626/tiwifabasonabuduvexe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/simple_comfort_3001.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/science_encyclopedia_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51851907441.pdf
    • https://cdn.shopify.com/s/files/1/0448/5559/1073/files/10806246588.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/astm_a1069.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/titudabizovutomol.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/zabadipad.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/chilis_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/17172017050.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/81446158297.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3389/files/cetonas_exogenas.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/all_math_rules.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_off000102d1.bin
5a0c1203dfbf290488a2f177b2c6c31fb2a54bf0d4ca039f87c023c82864ceec
pdf-font-stream PDF embedded font (sfnt) at offset 0x102D1 5084 bytes
font_01_sfnt_off00011411.bin
01acef5782a6feee16311740b94e118a650ed16cdcefcaf868b8ab2e15b1917c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11411 11740 bytes