Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee1275997a4319e…

MALICIOUS

PDF

49.9 KB Created: 2020-08-20 08:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2212dbb86b3714e8548913f297058d34 SHA-1: c04e27c27119743bbf0b9ec6dd18732a353f7b35 SHA-256: 2ee1275997a4319eecce4fe051470e40d1b8ea5165fdf9cf42cb20a58f92713d
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that points to the redirector. The presence of a large number of embedded PDF links, many hosted on Shopify, suggests a link farm or a method to obscure the final malicious destination.

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=font+awesome++one+icon
    • http://files.jonathanpschwartz.com/uploads/1/3/1/4/131437977/bexanut.pdf
    • http://files.janeritchie.com/uploads/1/3/2/7/132740435/zupobedozutekod.pdf
    • http://fuberesam.schwarzgoldce.org/uploads/1/3/1/0/131070374/54d0043117ae.pdf
    • http://files.rockinbear.com/uploads/1/3/2/7/132712127/dodimobo_penidofevub.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5490/files/mikajalig.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/benim_hocam_corafya_soru_bankas.pdf
    • https://cdn.shopify.com/s/files/1/0428/6460/7398/files/cd_action_1999.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48177964882.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/55126873907.pdf
    • https://cdn.shopify.com/s/files/1/0433/5403/0231/files/android_bloatware_remove.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/anabolismo_unam.pdf
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/kukeruzos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/john_deere_generator.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/vizuzimujarowibo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea2.bin
1624861aa2883694cb43624bdf5f34cb82bd005c2641b615714c3a2d61fbb69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA2 4652 bytes
font_01_sfnt_off00006e65.bin
03862d24f84983d6159cb691f35c7102c1499365016ba8ddca439e7f6912d403		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E65 12176 bytes
font_02_sfnt_off00009757.bin
c691c2dc236ff1c3149f8178f30dcb30456d959af2bd230901b395ad55359d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9757 16208 bytes
font_03_sfnt_off0000ac96.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC96 4324 bytes

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