Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f05f82b94f6e061…

MALICIOUS

PDF

47.8 KB Created: 2020-08-27 19:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 029b31cb886ce6e7c9759e8ae061ee31 SHA-1: a40a95f26ce5494646a5e47c4348a79e3aa9f15b SHA-256: 3f05f82b94f6e0615ece4facf666c60cbcb088666371d35dbe1b5e62048eff96
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.com/pify?keyword=pubg+banned+for+team+killing', is designed to lure users with a topical keyword. The ML classifier strongly indicates malicious intent. No scripts were extracted from this sample.

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.com/pify?keyword=pubg+banned+for+team+killing
    • http://files.88jamz.com/uploads/1/3/2/6/132696154/cc780a9911.pdf
    • http://files.fletcherscreek.com/uploads/1/3/2/6/132683292/winomoselo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/vimesijili.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/civil_engineering_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/non_st_elevation_myocardial_infarction_guidelines_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/process_account_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/megupuduzaxexelogikorona.pdf
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/84239081267.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/array_in_php.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/44425549775.pdf
    • https://cdn.shopify.com/s/files/1/0433/8840/3862/files/fobepofobomopurukow.pdf
    • https://cdn.shopify.com/s/files/1/0435/3150/1720/files/exercise_routine_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0433/3305/8710/files/40925903572.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/russian_academic_drawing_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5f.bin
067a702639a485e64f80dbc0d030c6ec993efb0c60b1162bb9779215ed4f15f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 5136 bytes
font_01_sfnt_off000080b7.bin
32c8d61dc51411b40bdc0290dfb2722c5e1d04ae50df45ec57c0b27b32ea9bea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B7 10456 bytes
font_02_sfnt_off0000a488.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA488 4324 bytes

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