Malicious PDF — malware analysis report

Static analysis result for SHA-256 efcbb687047d1c45…

MALICIOUS

PDF

48.6 KB Created: 2020-08-01 01:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73b651339f06c1f541828119cafe7332 SHA-1: a202e024568517f2aeb5241b967f9faef884a755 SHA-256: efcbb687047d1c4517812a1f7be066d22fe30e2502ec201ae530f133cfa596dd
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a PDF redirector link pointing to 'https://ttraff.cc/pify?keyword=you+thought+i+was+worth+saving+chords'. Additionally, another critical heuristic detected a PDF link farm with 16 external links, many hosted on cdn.shopify.com. The document body contains garbled text but also includes the aforementioned redirector URL and several other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content through a large number of 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=you+thought+i+was+worth+saving+chords
    • http://files.riveracorps.com/uploads/1/3/1/8/131856456/nodim.pdf
    • http://files.karenpikedesigns.com/uploads/1/3/1/6/131636562/50a4d6.pdf
    • http://files.soscarsoncity.org/uploads/1/3/1/6/131606121/3373008.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/80157941697.pdf
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/the_story_of_an_hour_irony.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/gajukupopovesoxul.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/5829457544.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/bepazowal.pdf
    • https://cdn.shopify.com/s/files/1/0439/1872/1192/files/punopewozizerotinor.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/taxabujegovemadilelonipe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9535/files/jimuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/suwelazopotivejataburif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/97961035121.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/puzolevubesiwemeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/66125950220.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000631f.bin
302ee50e4b54faec8174aa8a7748a03da511b500a5444bd742f18f8b4b3b2e39
pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 8332 bytes
font_01_sfnt_off00007f04.bin
38c9dc8d528e63e62afd2bbd0bcaab4b6cca9ad363f2fdcf815eef082e53fe3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F04 5280 bytes
font_02_sfnt_off00009110.bin
9857b607b087a86331e298ad187ff5bb5c1388abf7b78bd67b8cd8235b88d08b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9110 10448 bytes