Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f18fa358fdd8cb0…

MALICIOUS

PDF

37.5 KB Created: 2020-08-26 08:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7a6b201ace58bc848b2298b7bff15a3 SHA-1: a9c96f32ad84adf175bd1bf50d09a661a7244ecc SHA-256: 2f18fa358fdd8cb05954afcc1b4eae51afa5ebcc448c378db86c13a7f0ad8e66
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=epilepsy+action+training, which is likely used to redirect the user to a malicious site. The presence of many links hosted on cdn.shopify.com and other domains suggests a link farm designed 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=epilepsy+action+training
    • http://malixafiw.boonerplots.com/uploads/1/3/0/7/130738546/sovunuba.pdf
    • http://bugize.elegantdiamondjewellery.com/uploads/1/3/2/3/132303245/2d84786e51ff.pdf
    • http://files.jmsupplyga.com/uploads/1/3/1/6/131637853/3808439.pdf
    • http://fajopip.alaskarecyclingcenter.com/uploads/1/3/1/4/131453555/9168680.pdf
    • http://gudevimak.mixelle91.com/uploads/1/3/0/7/130775997/tujakebot-fotemimi.pdf
    • https://cdn.shopify.com/s/files/1/0463/6396/7643/files/android_access_root_folder_file.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/susipalinirekubedu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/mubilejeriwid.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5020/files/59899302411.pdf
    • https://cdn.shopify.com/s/files/1/0432/8584/0036/files/51476599538.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/gidagin.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/62849936849.pdf
    • https://cdn.shopify.com/s/files/1/0434/8264/4642/files/kamoledadebifodelupade.pdf
    • https://cdn.shopify.com/s/files/1/0459/9962/0263/files/bahubali_telugu_movie_naa_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/26399966274.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73633131036.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/tosemokigawumanuju.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_off00005395.bin
d84b80759cfb22b079765ff6ad8e1bce1ca808ec030b197c8ae5ff2de4566369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5395 5160 bytes
font_01_sfnt_off00006539.bin
b9903142cd2aff86319889348b4c362aa54ea9a9d138798d0ee7f1b91265b44e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 10616 bytes

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