Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0a6a15acedd337…

MALICIOUS

PDF

46.9 KB Created: 2020-08-07 22:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c8039c04e16b795a99b6a184537f388 SHA-1: cd758c3717da4d4fa78190176c7279b9ffe374cf SHA-256: aa0a6a15acedd337127c011a47a0d510ddc7696b966b86974b06c8a4b3550ee7
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm, designed to redirect users to external sites. One of the primary links points to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to academic material ('Biological physics nelson solutions pdf'), aiming to trick users into clicking the malicious 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.com/pify?keyword=biological+physics+nelson+solutions+pdf
    • http://sesaseno.itistheend.org/uploads/1/3/1/3/131379730/3296054.pdf
    • http://files.umfstudio.com/uploads/1/3/2/6/132681749/0ee74.pdf
    • http://lazuboked.tbclynchburg.org/uploads/1/3/0/9/130969332/8518783.pdf
    • http://files.comeshootwithme.com/uploads/1/3/0/7/130776200/9736772.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/roxugoxesize.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/joxineratitafes.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/lidigake.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/fepimiponanixiguserumifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/tuvamifuguzuxu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/python_get_terminal_width.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/pokemon_mystery_dungeon_explorers_of_sky_rom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/galaxy_s5_marshmallow_att.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_off00006c16.bin
386d8d622c0edf1c9924d17b1f5b018d9eef50ec87631463f17a3526709f6d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C16 5352 bytes
font_01_sfnt_off00007e4c.bin
e59dd00dd95ea64ca31979969624347f6bec71fcc8d723cf5ac640ac3d4cd826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 10064 bytes
font_02_sfnt_off0000a0b5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B5 4324 bytes

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