Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac093533ef00e94…

MALICIOUS

PDF

54.0 KB Created: 2020-08-18 14:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73976a18468035cd7cd9442945e6f8c4 SHA-1: 3dff6701474e5d580904dfd08c2b72f8a3837c3d SHA-256: eac093533ef00e94b6d3b68ab5cde7a924d4409a34235afb89d441c2ec9bb70e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=exothermic+and+endothermic+reactions+worksheet'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. While some of these Shopify links are confirmed benign, the presence of the malicious redirector is the most significant finding.

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.ru/pify?keyword=exothermic+and+endothermic+reactions+worksheet
    • http://files.katherinefusco.com/uploads/1/3/1/4/131453267/xalim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/sherlock_netflix_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/33426802214.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2560/files/86507567951.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/stardew_valley_sound_effects.pdf
    • https://cdn.shopify.com/s/files/1/0440/9108/0869/files/68864880259.pdf
    • https://cdn.shopify.com/s/files/1/0435/6695/6707/files/tales_of_symphonia_unison_attacks_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/sudonadowuxemimepumulumin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1110/files/the_digestive_system_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/joker_meme_template_car.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/libro_apologia_de_socrates_de_platon.pdf
    • https://cdn.shopify.com/s/files/1/0433/8011/3562/files/practical_guide_to_extrusion_blow_molding.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634d.bin
cf6bcbaf462759e04676f8989e7e87ed4d43c4317550ddbd0c5684ab0bd17b73
pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 6492 bytes
font_01_sfnt_off00007381.bin
0008f2bcfffb79466eee8f41fb83ee52ac1b7130778b54f2f6059a9f516a4e9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 5116 bytes
font_02_sfnt_off000084cd.bin
f24d5f4f88bdd800f8142cbc02cb89f634d1b7c31c2ee98d19cf760b200a5a18
pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 9860 bytes
font_03_sfnt_off0000a66e.bin
107dd7461bad0ee7f69ec232d7edbfa51533cbe03462e0930b0bd999c9024e27
pdf-font-stream PDF embedded font (sfnt) at offset 0xA66E 16152 bytes
font_04_sfnt_off0000bb74.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB74 4324 bytes