Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab641dfc987137c5…

MALICIOUS

PDF

41.8 KB Created: 2020-09-08 00:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b47b14b35a3d0502d82180db07e9d433 SHA-1: 2beeb8363a3391397dadce35da9dbc0142916761 SHA-256: ab641dfc987137c5d478e31e1d17cd58e992d31f9b7efeb603cd479de027afa5
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to a malicious redirector. The primary malicious URL identified is https://ttraff.link/wix?keyword=spider+man+3+ppsspp+settings+android. The document body contains obfuscated text and references to the malicious URL, further supporting the malicious intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=spider+man+3+ppsspp+settings+android
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/saxatide.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/gavasarenaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/acinetobacter_baumannii_antibiotic_resistance_thesis_submitted.pdf
    • https://static.usrfiles.com/ugd/d94ae5_97f6ac1fd78141f2ac8b61d56c8649f2.pdf
    • https://static.usrfiles.com/ugd/03dcd4_43c0840892624a5db41c3c6afc4bad5d.pdf
    • https://static.usrfiles.com/ugd/f91cf1_4e981320fefb4119a8849ab19fa407ae.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/10548809775.pdf
    • https://cdn.shopify.com/s/files/1/0435/1184/0927/files/70085162937.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9637/files/29323239788.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/sidonavobefakonil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/lodebubefawozasidedibikem.pdf
    • https://static.usrfiles.com/ugd/d54300_fcd5ad95bedc4fe6bc642ca8ffc5be04.pdf
    • https://static.usrfiles.com/ugd/22bf55_59c29368be4f4c0488d983b6169035dd.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_off0000638b.bin
0607e9cd8cba9e1dc02f46b637da68429d37e648b5dfeb89df26e891fde42cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638B 5516 bytes
font_01_sfnt_off00007629.bin
d7cf8f0313e4e0556bae8758cdc4305cdb6524368aa0ecb716c348afaa105771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7629 10564 bytes

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