Malicious PDF — malware analysis report

Static analysis result for SHA-256 988774d94062cec9…

MALICIOUS

PDF

48.4 KB Created: 2020-08-06 07:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 452b9e1bb70283d5e105b35a2b4c388b SHA-1: 4305bd2f28d3de009122ecf6a874df8e9e26b89e SHA-256: 988774d94062cec91d155962a9716d485b9ff92aebe3dae114981e41b9f8295e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, a common tactic for SEO poisoning or link farming. One of the primary links, 'https://ttraff.cc/pify?keyword=what+is+adverb+phrase+pdf', is identified as a malicious redirector. The document body, though partially corrupted, contains this URL and other Shopify links, suggesting a lure to a malicious site disguised as a document. No scripts were extracted from this sample.

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=what+is+adverb+phrase+pdf
    • http://files.kamcoent.com/uploads/1/3/2/3/132302824/4773626.pdf
    • http://files.skramstadprimitives.com/uploads/1/3/1/3/131380728/veguji-tatalo-virebure.pdf
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://files.fumckidsconnect.org/uploads/1/3/0/7/130739614/937b4f636a879.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/65952009261.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/osrs_theiving_training.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/82971954621.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/xasudu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/biwujir.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/28912821023.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/www_directv_com_rebates.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0960/files/sickle_cell_anemia_disease.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/45476395329.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/turefora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevimofurerofujasopam.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/bopogukixutudu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/24987911965.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_off00008043.bin
f78e006c717303d8a35e944ed67d577826c958d2fef7e651c6a0074a5102b8d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8043 5308 bytes
font_01_sfnt_off00009259.bin
8b2cf2117c2cfdc99bafd95f3f080cb73297af3dbde98c849eefd391660ff9cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9259 10072 bytes

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