Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4af2446ccd2664…

MALICIOUS

PDF

58.0 KB Created: 2020-08-09 23:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2347c3364a22523342221ad7cf316cf SHA-1: e8b99ca9b7f0bdeb509d10befa0a8d432b4ffde7 SHA-256: 8b4af2446ccd2664c935667aaa2d6b35f59af1bd56c898e90f57199384fa61b5
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to job applications, suggesting a social engineering lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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.ru/pify?keyword=application+letter+for+accountant+position+for+fresh+graduate+pdf
    • http://xodovo.lowcountrygiftedminds.com/uploads/1/3/0/8/130814297/5232029.pdf
    • http://files.kelownaliveedge.com/uploads/1/3/0/8/130873875/pukiwinegojepeb.pdf
    • http://lebomet.southernbridal.net/uploads/1/3/2/8/132814930/wupuleguxiwikewo.pdf
    • http://files.cummingchurchofchrist.org/uploads/1/3/0/8/130813489/4439767.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/nabogeluze.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/58070662742.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/zejukevok.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/44146945984.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/lightning_protection_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/94330551708.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/zesolexil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/3868499792.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/96877441513.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/45580315284.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/ropepupamu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/free_online_auto_repair_manuals.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d7f.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7F 2828 bytes
font_01_sfnt_off0000977a.bin
7aa126bb89227a53529e9dacda8e16cfc49906dbc77ab350f22c5ee5838c8ca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977A 5288 bytes
font_02_sfnt_off0000a963.bin
d3e932c724d3c9e41119ade5397ea16012c786ffe9f0d83461d3c3192157d951		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA963 10060 bytes
font_03_sfnt_off0000cbd5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD5 4324 bytes

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