Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c518238e6f09c9…

MALICIOUS

PDF

54.4 KB Created: 2020-08-31 07:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a37fa4646844e1bead24385a70642515 SHA-1: 21c39f501041b228d9aeb95f5f3d80f0af19def4 SHA-256: 84c518238e6f09c9436209a61046a508c46ccc25857a34a1e86dde8e0901c17e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests a campaign to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=bulu+monster+mega+evolution
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_605c73bb4fdf4a62acfc805c535965d3.pdf
    • https://static.usrfiles.com/ugd/3f4b99_dc52cc050d874290aeafe50e61286e01.pdf
    • https://static.usrfiles.com/ugd/b8c837_14a25d68ba944863b75be45b38f4838e.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_f546372de8ce4d70992c6960e5e1e91e.pdf
    • https://static.usrfiles.com/ugd/2274a7_f64a4423a8d445078af90762776dd028.pdf
    • https://static.usrfiles.com/ugd/fbccce_8b71dc5d6fc7472a985e0e108b9bac41.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1e15348104e4cf1a43f89dd17fac07f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f69efc7993d64722bb3375252cf638f6.pdf
    • https://static.usrfiles.com/ugd/76de1a_d261ca3dda5140408a2895744cd44299.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_328ea449e90643398dce6964ea5b42e0.pdf
    • https://cdn.shopify.com/s/files/1/0437/0438/5686/files/lururetoleru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0835/files/romarofixiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/19913532584.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/acidosis_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/80455042587.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006459.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 6440 bytes
font_01_sfnt_off0000744d.bin
7a43daae197692e7712ed2a9cb428ab0ac75bac77a64654174de7bb18a48a9db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744D 4996 bytes
font_02_sfnt_off00008534.bin
e746b96290c0538dba11ec819ee85647029aba58137fc60630b161541b060bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8534 10608 bytes
font_03_sfnt_off0000a90c.bin
cbae618fb607c4f1f5c6a35a442c0b8ff760967352cc7cd3b4d643e2e78b29ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA90C 16064 bytes
font_04_sfnt_off0000bdab.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAB 4324 bytes

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