Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac1bf92b59a9cfe…

MALICIOUS

PDF

34.5 KB Created: 2020-08-21 20:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f7ca393e9f08933f612a7a3af5283e6 SHA-1: 904d050d90df6d3d7963a7faa44b9c6b7b18b603 SHA-256: fac1bf92b59a9cfeb32e77eef0a0f847fa0a808608e7ac59b8bc2c1e0e23cbfe
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are hosted on Shopify but ultimately redirect to potentially malicious domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented as an 'almont colorado weather report'. The document body, though heavily obfuscated, contains this lure text and the malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links.

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.cc/pify?keyword=almont+colorado+weather+report
    • http://files.fairwaycommunity.com/uploads/1/3/0/8/130874610/zirubote.pdf
    • http://riwasade.milieu-art.com/uploads/1/3/0/7/130740145/pafedorukoxus_poxif.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/dikux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/sajaselozejuli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2500557594.pdf
    • https://cdn.shopify.com/s/files/1/0452/7387/4594/files/benny_goodman_clarinet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2922/4857/files/ageless_body_timeless_mind_full.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/noxonofomun.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4902/files/vavevuvewaforep.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/cesur_yeni_dnya_yandex.pdf
    • https://cdn.shopify.com/s/files/1/0452/0201/4357/files/french_language_guide_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/brosimum_gaudichaudii.pdf
    • https://cdn.shopify.com/s/files/1/0428/1516/0487/files/ashokan_farewell_violin.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/xetep.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/barbusse_feu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/2266881710.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_off00004a8a.bin
119c233f2a7b59d649eb823ab8f81a553c4e162058593dab69fbc09c91420405
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8A 5216 bytes
font_01_sfnt_off00005c1f.bin
6108fc2fea95b162fbae7577964d85cee8722be39c03005ca2e5c8d5b8b359c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1F 9796 bytes