Malicious PDF — malware analysis report

Static analysis result for SHA-256 d061630a69e5ebdf…

MALICIOUS

PDF

42.2 KB Created: 2020-08-07 15:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 968f3e21a054eb35adc984fffd145321 SHA-1: fd3477c4d71db06f2def71403a9a0ad4b484806e SHA-256: d061630a69e5ebdf60c8fb251a2612f378dcfe360885476f6dc261603b37d289
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body text and embedded links suggest a lure related to converting "Chegg ereader" content to PDF format, likely to trick users into visiting the malicious site. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content or redirect traffic.

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=chegg+ereader+to+pdf
    • http://files.creditrepairsyracuseny.com/uploads/1/3/1/6/131607053/fca2fd9df.pdf
    • http://fizepol.anodynesurgical.com/uploads/1/3/0/8/130874524/9949746.pdf
    • http://files.tulipanproductions.com/uploads/1/3/1/3/131381374/subopixadenajinoj.pdf
    • http://files.stcroixbirth.com/uploads/1/3/1/6/131606408/f32a55.pdf
    • http://files.ashleys-plate.com/uploads/1/3/1/3/131380995/4580139.pdf
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/fukozutosaregoterorelape.pdf
    • https://cdn.shopify.com/s/files/1/0433/3282/9342/files/65180453943.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/86842882711.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/ruxatobew.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/ropifurutones.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/biogeochemical_processes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/punarixumeziwufawowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/73867219378.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/14184571691.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/15904006116.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3293/files/solivoriki.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/color_test_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/windows_powershell_commands_list.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006739.bin
7fddb7787804045de7eb505d03009d7a4beceba203fe88ad946a296223de926e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 5000 bytes
font_01_sfnt_off00007833.bin
80d697a2039ba852f2322dacbd4760bc9184bebf3b138e3b2bd4d278b3f8add1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7833 10444 bytes

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