Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7e57520e175855…

MALICIOUS

PDF

61.0 KB Created: 2020-07-31 22:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e681a4b8cb427a6a4b33b5cf4f43f438 SHA-1: 984580ed86f86d1899810aa96cc037eef5807e43 SHA-256: 7e7e57520e1758558b41f562ecf8058d8aafd6267cdcae2634c17f313dbe5eec
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO poisoning. One prominent link, 'https://ttraff.ru/pify?keyword=minecraft+windows+10+coordinates', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure under the guise of providing information related to Minecraft. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

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=minecraft+windows+10+coordinates
    • http://files.rhsil.org/uploads/1/3/1/1/131163684/wubonemikum_xivomakisemo_sotuvidumagitut.pdf
    • http://files.drlinkedin.com/uploads/1/3/2/7/132740552/d1ad9.pdf
    • http://files.zvovtrio.com/uploads/1/3/0/9/130969377/jepexexikurilixuz.pdf
    • http://files.urbanhindu.com/uploads/1/3/0/7/130738943/milovo_filerapemebur_nejimojilomik_wuzebasozodanuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/logebuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/rodiwebepavetutenusa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/79195209330.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/1330086860.pdf
    • https://cdn.shopify.com/s/files/1/0434/6354/0902/files/64167305050.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/fujikexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1001/5910/files/49303012211.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/52119380733.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/63317060518.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/retutajedodifol.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/71650042393.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/karebafuwuxegezobuzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4026/0775/files/20281894031.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_off0000b020.bin
32d66921d70ddcd8e44902babc591726440ef38ab4d5155d09c6869c1eda0a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB020 5272 bytes
font_01_sfnt_off0000c240.bin
8fc1c9abb7521cb0695257954a50ff57e1860327c67c22e67f676e0c53fc863a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC240 10776 bytes

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