Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33fc7c5eba88f26…

MALICIOUS

PDF

54.4 KB Created: 2020-08-21 16:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1d410ca4062b7100e81cec321e2b348 SHA-1: 4a09970ad811a1ed8307d9c8eb21d58543050d01 SHA-256: f33fc7c5eba88f26eefffbc8330e38d1a7c272bcc582a0af57d2745823246832
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'itc american typewriter bold font free' and a URL that appears to be part of a link farm designed to manipulate search engine results. The primary malicious link identified is https://ttraff.cc/pify?keyword=itc+american+typewriter+bold+font+free, which likely serves as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=itc+american+typewriter+bold+font+free
    • http://files.bluejaymobilehomepalmharbor.com/uploads/1/3/1/3/131381722/7096882.pdf
    • http://sovem.emateria.com/uploads/1/3/0/7/130776255/5678706.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/el_acto_administrativo_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6275/files/64536630552.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/17662506256.pdf
    • https://cdn.shopify.com/s/files/1/0440/0100/1630/files/lojepuxosapexipiwuxelor.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7189/files/43872458519.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/puwezexutiratiligeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/cooking_calc_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8836/files/dynamics_of_structures_chopra_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2739/7797/files/63167221480.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/34624436670.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005075.bin
d841e6ee9fc5f8d88f1d94419f2a0f587508a927e8deb92e2b18ca34c352e48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5075 6168 bytes
font_01_sfnt_off00006014.bin
c1c2152787650c434451fdd703de31b218db735c0d61e183ef90100eacd6ad3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5392 bytes
font_02_sfnt_off00007258.bin
6d3670d696b8ccc041f04a57b8bc375bcbe08a14ee083eebadad81685791dbf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7258 2084 bytes
font_03_sfnt_off00007b6a.bin
371343d2ec928bb2dad1c8fc4181cbefec1f6977b629e52cd2a2ab5b89bf3acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6A 18952 bytes
font_04_sfnt_off0000b68b.bin
c90602baf7b69d9cb1f05bb35ff5167186fee5b8cd2fc02e39556cd2e1150d8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB68B 16152 bytes

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