Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a4ce5fcb444bfa…

MALICIOUS

PDF

42.0 KB Created: 2020-08-06 23:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aed79a0201483b30682c0bcef2648b3 SHA-1: 20ae7b745a5dd1721307c0639f7b962395f52e60 SHA-256: f1a4ce5fcb444bfa7afa83d8345bad79ed11618538239d14f42c346d6025e57a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to benign content on Shopify. However, one critical heuristic firing indicates a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=english+grammar+test+upper+intermediate+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. 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=english+grammar+test+upper+intermediate+pdf
    • http://files.wightmantennis.org/uploads/1/3/2/6/132681144/e09120ce.pdf
    • http://files.optodev.org/uploads/1/3/0/7/130776826/govadijafopefididiwa.pdf
    • http://files.generationwhycomic.com/uploads/1/3/1/4/131406390/sijodewejarevobul.pdf
    • http://files.mcminnvillematters.com/uploads/1/3/1/6/131636700/5694674.pdf
    • http://files.whereisyourangel.com/uploads/1/3/1/3/131379680/dejif.pdf
    • https://cdn.shopify.com/s/files/1/0428/8456/3110/files/how_to_unhide_a_post_on_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/58176592718.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/mamubabizaduzewufizuxedep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/55902246064.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/balajuja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/8599550412.pdf
    • https://cdn.shopify.com/s/files/1/0430/9146/0247/files/wefimufasanewebosagu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kijajakunij.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/ganadojafoboxesisonilufuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/fujedotuxilidowivagefale.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_off000066f7.bin
cce6d328482f83496303fd63cd4eacb9e767c153d28787db97b8655a98874d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F7 5412 bytes
font_01_sfnt_off00007936.bin
6e5e105486e663bcfa24642a079d221832955bf7bdfe84bba4ff0737aba261fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7936 9852 bytes

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