Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5cd0f77640a0d3…

MALICIOUS

PDF

64.6 KB Created: 2020-08-09 14:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673244055e03a5e6e3067bc94ab09697 SHA-1: 3759f8856ebb4d772be2c59b46794b047d59a615 SHA-256: 3f5cd0f77640a0d35939316753821ddaf772f07275637dab8e19415734ad154c
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially garbled, includes text suggesting it is disguised as educational material. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=alkanes+and+alkenes+notes+pdf
    • http://files.magicbenyoung.com/uploads/1/3/2/6/132682342/filoduxalati-woxetogoligilo-rufegorodixes.pdf
    • http://files.northfieldrobotics.com/uploads/1/3/1/8/131871730/f70cef8d3f0c9c.pdf
    • http://files.keya-tshirt.com/uploads/1/3/2/6/132682051/dozajesapujeg_zereza_rotutos_tonemitadubifa.pdf
    • http://files.lovingbackyardsquirrels.com/uploads/1/3/2/7/132741334/zozosuderenive.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/julojimonewojovamebewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/kobitaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7752/3861/files/human_anatomy_9th_edition_marieb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/87481009476.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/space_engineers_split_stack.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/zatiwotewenaxovokad.pdf
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/understanding_renewable_energy_systems.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/suxixebotod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vojinanekarab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/bupas.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_off0000abca.bin
2f71dc7c2e1111ad23bb9d95bca44ff892d2128d5ad63d21b1c95b1613081303		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABCA 4992 bytes
font_01_sfnt_off0000bcdf.bin
8bda3a81e271ad3a6c292a5ea670db36ef27e362f031ed520f10b1fb97fd7bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDF 10336 bytes
font_02_sfnt_off0000e04a.bin
01918ab328aad74c9e8f640f01f786fd0c2e0e9f3673bd8045474dd117871356		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 16080 bytes

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