Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afdef92962d25e9…

MALICIOUS

PDF

78.6 KB Created: 2020-07-23 19:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8635c490fcabb280a4d8886f8a7e034f SHA-1: a80db19c708e2485a1ca024f8e5272aa1aefdee2 SHA-256: 8afdef92962d25e986d279c15f1949c03b6f5cdb4aa05d58cf3032a05ca1c895
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', disguised as a 'Black Desert Online map guide'. The file also contains a large number of links to external PDFs hosted on Shopify, suggesting a link farm for SEO manipulation. No scripts were extracted, and the document body is heavily obfuscated, but the presence of malicious redirector links is a strong indicator of malicious intent.

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=black+desert+online+map+guide
    • http://files.serenavitabirth.com/uploads/1/3/2/8/132814567/2685752.pdf
    • http://files.propellertherapy.com/uploads/1/3/1/4/131406527/7833012.pdf
    • http://files.denvermaternityservices.com/uploads/1/3/0/7/130738562/nazeguxi-kagukovidaba-fisov-nalujebosas.pdf
    • http://files.propellert
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53741046047.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7688/files/34895317452.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/2461474417.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/13290304527.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/bubufapilusul.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/65815004630.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/saxusetubimuzagibadaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/litarulitidamakeku.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/76885528873.pdf
    • https://cdn.shopify.com/s/files/1/0435/4516/5976/files/tajakuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7688/files/webotige.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/19843983553.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c668.bin
7ebaa6bb6ac39aadb6a899c15a73f887e248518c5e31df0a8ba383b45ba81862		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC668 11192 bytes
font_00_sfnt_off0000b441.bin
e31112c0950b603696c6fce6de49de5f9c5da525f39b22c6bbe596b9331b4298		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB441 5388 bytes
font_02_sfnt_off0000e61b.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 1800 bytes
font_03_sfnt_off0000eea8.bin
8d9ea6ffcb683d6892de143e63fee9363f32a7cf5b15491756fff38d7a795482		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 10680 bytes
font_04_sfnt_off0001134b.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1134B 16312 bytes

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