Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc92d5b7ba1a806…

MALICIOUS

PDF

119.7 KB Created: 2020-08-12 04:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1742cf531edf3f316c4a989cc8da775 SHA-1: a30ea046ce984dc69ada8679ffc85ae93d05bb3d SHA-256: 8dc92d5b7ba1a806fcac4592ccbeeaf99748fe9b9a8ff3b919b26a7731467cc3
170 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is a known malicious domain. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify. The presence of a 'download button' lure and instructions for a password-protected archive suggest an attempt to trick the user into downloading and opening a malicious file. The primary malicious IOC is the redirector URL.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=mineralogia%20klein%20pdf%20download
    • http://files.arlettevandeneycken.com/uploads/1/3/0/8/130874359/0d53d6ffb3.pdf
    • http://womadi.sensorydeliveryroom.com/uploads/1/3/1/4/131453574/5789118.pdf
    • http://files.quintinhamojud.com/uploads/1/3/1/4/131452959/nuwijeni_wakefuwonisireb_xusumapudofovi.pdf
    • http://files.charmingandchair-ished.com/uploads/1/3/1/8/131856703/8811040.pdf
    • http://files.ours-winnipeg.com/uploads/1/3/0/7/130776769/lemubuzexozurira.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/70449566367.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/99893546316.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0398/files/75193534694.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7624/files/lower_back_pain_exercises_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/pimopokodobefarajalafo.pdf
    • https://cdn.shopify.com/s/files/1/0452/3776/4256/files/weighted_average_method_of_inventory_valuation_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/8966/4926/files/matikofewajegikituvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/56083539711.pdf
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/minecraft_forge_1_6_2.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_off00018b7e.bin
7192be259595741b8916f7a151a13b1fa6488a09506f364c05702dce291fea86
pdf-font-stream PDF embedded font (sfnt) at offset 0x18B7E 5192 bytes
font_01_sfnt_off00019d4b.bin
9289de3f9ca003005f4c5c4d6d6b3d3c6ce7a8bc6d5c91396441318ab24d0a6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x19D4B 16876 bytes