Malicious PDF — malware analysis report

Static analysis result for SHA-256 080d7008ccdbac15…

MALICIOUS

PDF

60.2 KB Created: 2020-08-08 17:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a4afde0b0df6ff2de5930de6c0aaef SHA-1: 64b9f441c136094b984ac4549b6e55f2ddfd82df SHA-256: 080d7008ccdbac15fb560297dccf0b30b6eeb65ea691018669b03f50f9ce985e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one critical heuristic identifying it as a redirector to malicious infrastructure. The document body, though obfuscated, contains the primary malicious URL. The ML classifier also strongly flagged this PDF as malicious. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to lure victims.

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.ru/pify?keyword=a+computational+approach+to+edge+detection+pdf
    • http://files.institutselmane.com/uploads/1/3/1/4/131407089/8fb153c527742a3.pdf
    • http://zugoma.jongrahamphoto.com/uploads/1/3/0/7/130775429/8495001.pdf
    • http://files.mazzulab.com/uploads/1/3/1/6/131637814/a8d7f.pdf
    • http://xobonu.tara-sarahna.com/uploads/1/3/1/6/131606490/1943a9883e1.pdf
    • http://files.swimbarbadosvacations.com/uploads/1/3/0/9/130969862/darufe_tezepej_sivobowaxakisux_kirurubi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/87360258810.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/zedugokidom.pdf
    • https://cdn.shopify.com/s/files/1/0443/5856/6044/files/anisocoria_causas_neurologicas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/84983466771.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/wevitorotedazipufibepefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/divulerarimosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/zoxezotobezubunemapibek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/tewerosebitamotibum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/59315830071.pdf
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/lewikiboxuvugamezejimamal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/gozizekopofe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6338/4991/files/82611402076.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/jasubasemoxenenez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ralaguguzovepusumizus.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008973.bin
a0f6da8321a24a9f28e121854809ab5aa757d536600538ff33b7ffc54a0186c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8973 5260 bytes
font_01_sfnt_off00009b21.bin
a75977ea925c4d95487cf556de10a6a58363d217df57fb691f14320d649d9f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B21 10752 bytes
font_02_sfnt_off0000bfd2.bin
16ec8717e79109bdf41b84b2d95e1e14a4025ba571ded87f7fafd23da5100dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD2 16116 bytes
font_03_sfnt_off0000d4b4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 4324 bytes

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