Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e30e07ceabeaa6…

MALICIOUS

PDF

46.5 KB Created: 2020-08-14 01:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac1a859e8cd4fac9d1a1b778ff6f390a SHA-1: 71191083cec9d05aba98dc3831c6afce31ceb45a SHA-256: e3e30e07ceabeaa68a72bf7c114ed83d10b03575235668c426f3544831906af5
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=formal+interview+wear+for+ladies'. The document body, though heavily obfuscated, contains this same URL, indicating the primary intent is to redirect the user to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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=formal+interview+wear+for+ladies
    • http://files.shunsart.com/uploads/1/3/2/6/132695216/bozovufiruvige-dixub-jirodur-tomonixalan.pdf
    • http://xutajepiz.kcorbinfocus.com/uploads/1/3/1/6/131636879/wisewum.pdf
    • http://files.lorileicooley.com/uploads/1/3/0/7/130776791/wusiseg.pdf
    • http://files.gunnessfinancial.com/uploads/1/3/0/7/130739312/881142.pdf
    • https://cdn.shopify.com/s/files/1/0435/0925/2250/files/buff_dudes_bulking_plan.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/medical_virology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/1935/1710/files/gonoxuzomidajetasekid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5575/files/93061332396.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/24676598831.pdf
    • https://cdn.shopify.com/s/files/1/0433/5268/6742/files/wolodukulol.pdf
    • https://cdn.shopify.com/s/files/1/0445/8987/5364/files/90875677097.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/duviduzipoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/2286035152.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/le_rationalisme_en_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/ventajas_y_desventajas_del_aprendizaje_autonomo.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/
    • https://cdn.shopify.com/s/files/1/0430/8110/5575/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077bf.bin
cd908cca55534dbbee04c5cca8a806621a9b27c0c0e0abf357504443e799387d
pdf-font-stream PDF embedded font (sfnt) at offset 0x77BF 5160 bytes
font_01_sfnt_off00008945.bin
daddd586260b4e1f3caeec8e9e3cba6f09300c6453eac8557633969e336f2d8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8945 10424 bytes