PDF malware analysis — malicious · 9298c4cabe8a1e44

MALICIOUS

PDF

59.3 KB Created: 2020-09-19 10:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a68ff504d769737e96e44c14a392f7aa SHA-1: 93876f0cd43ee29643a9f490f02725373d592ef6 SHA-256: 9298c4cabe8a1e440e02e38e908e50ff0d9e4c702eb93ef1b71316ee81a94d53

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=spanish+preterite+exercises'. This URL is presented within the document body, disguised as educational content. The PDF also features a link farm, with numerous embedded URLs, many of which are benign but likely serve to obscure the malicious link. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=spanish+preterite+exercises
- http://jaratu.cmajor7music.com/uploads/1/3/1/3/131380433/69f8fff3d4cfb6.pdf
- http://nuwen.lornathomasphotography.com/uploads/1/3/1/6/131607095/nosure_jijurijilazo.pdf
- https://02181850-7b5d-4bba-8038-f0430ef9e186.filesusr.com/ugd/8d5d69_7d18c02d5d95466ab0264b6b63ae3430.pdf?index=true
- https://93796ad0-99ff-4e92-802b-8b84b260e21c.filesusr.com/ugd/d017d5_d5d955250b604de7938aa3b970470d17.pdf?index=true
- https://b1c001c0-3153-4c2c-9745-5c20e9635536.filesusr.com/ugd/ee6770_cbd53ec048e94f6dab576bc7e5c83243.pdf?index=true
- https://cdn.shopify.com/s/files/1/0433/8476/6620/files/gimuxe.pdf
- https://cdn.shopify.com/s/files/1/0448/9238/9531/files/11th_bio_zoology_practical_manual.pdf
- https://794a9aa5-3782-4b2c-80f4-63db899ee980.filesusr.com/ugd/bb05c1_4d5ab0705de241bc8bdd454360818483.pdf?index=true
- https://1719c139-aee1-4d14-87b8-1ecadabd34f5.filesusr.com/ugd/e3c460_65120d5638464579a4d20e1bfe45c431.pdf?index=true
- https://ec79f283-f624-4974-850b-6fe91ecd77ec.filesusr.com/ugd/e6e573_b5391e080ae84beb9fd3d0ad6b4b5017.pdf?index=true
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off000084b7.bin` `3f0b1ea2bb2186e944f9ae68c5f9ac80d5bc7188aa9d6bbcc7d8dc0944ef5023`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84B7	5160 bytes
`font_01_sfnt_off00009638.bin` `51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9638	1800 bytes
`font_02_sfnt_off00009ec6.bin` `5e7f6746a9caf906cf3504f8eb038d5989359b99dca835f4ca43ac265d551fb1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9EC6	13688 bytes
`font_03_sfnt_off0000c9d3.bin` `7dc293a6b0f08b88f161d6452387d9af6548baac153f16c2bffe5f4935ef4bf3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9D3	16884 bytes

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