Malicious PDF — malware analysis report

Static analysis result for SHA-256 d991ab0bcde6f387…

MALICIOUS

PDF

55.1 KB Created: 2020-08-08 19:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5261a9d1c2567d61aedf84fd30e2a89a SHA-1: 22df30f88646fcdca714cb55a82b41a05d3e609d SHA-256: d991ab0bcde6f38715ba0fbef502ab391779d36fedab1d4951044e59cb5977f8
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm. One critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by the heuristic, suggesting the document's primary purpose is to drive traffic to malicious sites.

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.com/pify?keyword=accounting+equation+solved+examples+pdf
    • http://files.kelseyleon.com/uploads/1/3/2/3/132303245/rabam.pdf
    • http://files.calliebell.com/uploads/1/3/0/8/130873820/f046215555.pdf
    • http://files.darkfableminiatures.com/uploads/1/3/1/4/131482931/wesanoxovor.pdf
    • http://lakonud.ehmotorcredit.com/uploads/1/3/1/0/131070450/7629446.pdf
    • http://files.ironstonemeadery.com/uploads/1/3/2/6/132683168/5491caac204bc.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/pabuzusanado.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/ski_doo_mxz_trail_schematics.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/stanadyne_injector_pumps.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/pseudo_dionysius_mystical_theology.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/fugawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/10603775480.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/12279923206.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3873/files/parkour_maps_for_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/nupaxejili.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/56404707721.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/judizosanudinonevumizek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1220/files/github_image_size.pdf
    • https://cdn.shopify.com/s/files/1/0437/6100/8791/files/10036732127.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_off00008392.bin
7f31fcf44bbf78bc726362425cded790ce615fcd282b3fc9299cc3df555f10d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8392 5504 bytes
font_01_sfnt_off0000963d.bin
b68ca7fe4b4efb6f3fc9a57f47b11dd28a8cbccada9ed4659b14b37f7e66cfa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x963D 13340 bytes
font_02_sfnt_off0000c0c1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C1 4324 bytes