Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6e180e2149b766…

MALICIOUS

PDF

69.8 KB Created: 2020-08-27 23:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1393a95807ba2b338416415f3539a801 SHA-1: 77a308d9c94582891868780619d8ba00c0669942 SHA-256: 1e6e180e2149b766c1b6ef7254b82c37339204f34066c688ea9d0f272e4752f3
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains text related to sheet music and the redirector URL, suggesting a lure. The presence of numerous external links, many pointing to Shopify, indicates a potential link farm used for SEO poisoning or distributing malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=de+los+alamos+vengo+madre+rodrigo+sheet+music
    • http://gofaseri.faceofkenya.org/uploads/1/3/2/7/132741155/pewugu-zujefus.pdf
    • https://cdn.shopify.com/s/files/1/0440/5719/8742/files/the_cask_of_amontillado_short_story.pdf
    • https://cdn.shopify.com/s/files/1/0436/3599/8880/files/47441191059.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/51509161940.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/36420416080.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/frasers_property_limited_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0438/6032/8608/files/tesafiworotipomaxakonovab.pdf
    • https://cdn.shopify.com/s/files/1/0431/9667/8301/files/98313319039.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/xisin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/dometic_air_conditioner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/77169865435.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/59974318289.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_off0000d123.bin
0783240be80f7b3744647beb74c837244192e748e68083e05447c0daae2ec96a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD123 5412 bytes
font_01_sfnt_off0000e368.bin
ad7e639100cc145bc6b2d407a6407065ff8d90a0a0df7b725167c9ea91996c00
pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 11400 bytes