Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0b6b8fa6ba5c24…

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 08:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d49421527cf2007b8d6b2cea77829cd7 SHA-1: 55515646725e30c213b08cc1ef3fa259b1e4cafc SHA-256: 4f0b6b8fa6ba5c2419138c14ca0cab47a1bc07dffcfff29c11c43229bc3e8f71
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily corrupted, contains text suggesting it is a 'mining joint venture agreement pdf' and includes the malicious URL. This indicates a social engineering attempt to trick the user into visiting a malicious site.

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.ru/wix?keyword=mining+joint+venture+agreement+pdf
    • https://static.usrfiles.com/ugd/b8c837_b72dee6326534a7fa73e2601425d7c25.pdf
    • https://static.usrfiles.com/ugd/067ecb_c4b4a37c711c449d9051bb4bbfe4e084.pdf
    • https://static.usrfiles.com/ugd/fdee49_1a0f56bb06fa49c3978c0b3bb1ed1700.pdf
    • https://static.usrfiles.com/ugd/7d21c0_6b0f0904e7444448a207fb36e5d7d408.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2c33be4e9054e7ab1484c88756a0f58.pdf
    • https://static.usrfiles.com/ugd/6f7357_fee373827be044598c89a98106123497.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1973744e4844790b9d1f559f1a097b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d37cacaac1b4d3b83e38fa871d2ed5f.pdf
    • https://static.usrfiles.com/ugd/98857b_24e395489ee948fe9836cf54b959ff1e.pdf
    • https://static.usrfiles.com/ugd/2f8cea_0f89f957bfef4d05bd1a8aa448035e18.pdf
    • https://static.usrfiles.com/ugd/b8c837_0112edbed89145b9be46dabcb3dd0050.pdf
    • https://static.usrfiles.com/ugd/5438e3_3873e80f56e3467cbc2f4c06033c2930.pdf
    • https://cdn.shopify.com/s/files/1/0437/5586/4215/files/baviboboduwubobitijowe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/52851489821.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/zoxikowufigarowixaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/58742315670.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_off00006de0.bin
78acd6259632f8248d86a3277aadbead6cf65cb1ef5c1fd0151d306d9c9be45c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE0 5176 bytes
font_01_sfnt_off00007f71.bin
036de82e72444584962c4c7fa22cdca7cab0dc208c29dc76e2b607e7db0421ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F71 9880 bytes
font_02_sfnt_off0000a11c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA11C 4324 bytes

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