Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a8fefc33b31689…

MALICIOUS

PDF

60.9 KB Created: 2020-08-09 22:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d32b7501fd0d20bdbda60f99492565af SHA-1: 19634559bd426c93e2558188034a7d925cd3cc03 SHA-256: 38a8fefc33b316898f3e8c1af54c7c7d17c483c63c438ef727a5ebd9e4b5fb65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to Shopify domains, but the primary malicious link is to ttraff.ru. The document body and heuristics suggest a lure to download or interact with a remote support tool, disguised as a dictionary PDF. The embedded URL https://ttraff.ru/pify?keyword=cambridge+dictionary+book+pdf is a critical indicator of malicious redirection.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/pify?keyword=cambridge+dictionary+book+pdf
    • http://files.mylittlehermescollection.com/uploads/1/3/0/9/130969371/8223319.pdf
    • http://files.simonpaine.co/uploads/1/3/0/8/130874482/1684296.pdf
    • http://binobo.elusiveaudio.co/uploads/1/3/2/3/132302963/1037523.pdf
    • http://files.animalprograms.org/uploads/1/3/1/4/131453018/bisesukag_jufakutaremow_niwixupana_fanoxomotut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/31375287705.pdf
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/48593440921.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/78566532399.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/210851145.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/wugifewi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/towasilal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/bafiranifijixanuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/23509444157.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/lebemomewasusuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/70130229712.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6815/files/basic_technical_mathematics_with_calculus_10th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/gogoxejilisopiwopika.pdf
    • https://cdn.shopify.com/s/files/1/0428/6873/6166/files/19280792252.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000512f.bin
354ee530894445739401731dab422c12ea132cbedd463dc5ac3bef36f0c42faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x512F 9400 bytes
font_01_sfnt_off0000705e.bin
5d93742b95e41fe415f742dba9eddc3596d21263e9329d27b85c4c2073c3d9c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705E 5380 bytes
font_02_sfnt_off00008298.bin
ee2f5ec1ed34befe91a76a75969ebb165a7f11912c6318dbd1c74abed3c6b018		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8298 8036 bytes
font_03_sfnt_off000098e1.bin
faaf4491eabae515bbe0826a648ca090bb6e5cd58efa45ab305fea7887382a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E1 10040 bytes
font_04_sfnt_off0000bb61.bin
e5360e8752cccb2d23a73734cdde2442202d3dd5da719c787a5db34787407195		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB61 18252 bytes
font_05_sfnt_off0000d76d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 4324 bytes

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