Malicious PDF — malware analysis report

Static analysis result for SHA-256 deda76c58f0f576a…

MALICIOUS

PDF

53.0 KB Created: 2020-08-13 23:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59af4d24ee7c1893c130a0d41547bce0 SHA-1: 941eeb66a5b6fa9eb88be49a13c24282877dc720 SHA-256: deda76c58f0f576a8bb2a711ab66235c9176eb060af58d0c74b3f2980aa24a9a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF file was identified as malicious due to the presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic, indicating a link to known malicious redirector infrastructure. Additionally, a PDF_SEO_LINK_FARM heuristic fired, revealing a large number of external PDF links within the document. One of these links, 'https://ttraff.cc/pify?keyword=first+aid+guide+wow+vanilla', is a known malicious redirector. The document body contains garbled text but includes the same URL, suggesting it is the intended lure. The file's purpose appears to be directing users to malicious content through a deceptive link farm.

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=first+aid+guide+wow+vanilla
    • http://zulozuf.sullivansgulch.org/uploads/1/3/1/4/131453540/lasadule.pdf
    • http://files.misfitcrusaders.com/uploads/1/3/0/8/130814672/634f8e.pdf
    • http://files.meaningfulmathmoments.com/uploads/1/3/0/8/130874652/kaxiwatoraf.pdf
    • http://files.janetmansfield.com/uploads/1/3/0/7/130775734/9148627.pdf
    • http://files.greatlakestreeservice.net/uploads/1/3/1/3/131398142/dewuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/93584802704.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6615/files/unistd_h_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/95737875585.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/turitome.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/jepawuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/fokubotor.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/61888903831.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/zevetovuzegufujabiveb.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/6892171032.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/roponuwobujoruzupijera.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/symmetry_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0436/5585/6281/files/august_2017_algebra_2_regents.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_off00009217.bin
2645024ec90c138f74ab9009fd447809e7667e1cce3e2d46457a784219bdf41d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9217 5100 bytes
font_01_sfnt_off0000a393.bin
d2da65e300e56928b06d1bd80e5c795009fa67ab62ad4c3ba1e2c6d3499278f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA393 10512 bytes