Malicious PDF — malware analysis report

Static analysis result for SHA-256 884375ccdecf28a6…

MALICIOUS

PDF

45.9 KB Created: 2020-08-14 02:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7ac0aa65cdcf3bacc2b3d33e03336c8 SHA-1: 1bd79ad825e14aa39655bcc18a6cd5c0d44e6935 SHA-256: 884375ccdecf28a654d8af8e0bd487b97be66db7c108eafb55985a439bf3e6ef
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 identifying a link to known malicious redirector infrastructure. The document body, though malformed, contains text related to medical conditions and a URL that appears to be part of an SEO poisoning or link farm strategy. The primary malicious link identified is https://ttraff.cc/pify?keyword=sarcoidosis+uveitis+pdf, which likely serves as a gateway to further malicious content.

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=sarcoidosis+uveitis+pdf
    • http://files.taylorsgreenhouse.com/uploads/1/3/1/4/131406369/wefukax-vodov.pdf
    • http://peduxa.newaygocd.org/uploads/1/3/0/8/130873782/kejej.pdf
    • http://files.thestyleofsubstance.com/uploads/1/3/1/4/131406604/590218.pdf
    • http://files.koshishpanindia.com/uploads/1/3/0/7/130776241/a49eef129f7d8.pdf
    • http://files.xcelerationvbc.com/uploads/1/3/1/3/131383743/pivarafu.pdf
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/2527320423.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6019/8557/files/ielts_writing_task_2_samples_academic_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/juzakitasapogenog.pdf
    • https://cdn.shopify.com/s/files/1/0440/0388/5206/files/54022581176.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/4858692406.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7936/files/english_grammar_learning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/causas_y_consecuencias_de_la_contaminacion_atmosferica.pdf
    • https://cdn.shopify.com/s/files/1/0440/3298/3190/files/19056262961.pdf
    • https://cdn.shopify.com/s/files/1/0432/9963/5355/files/wabimagetobizatofevuzo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/wumesolobobizuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/renexupejativuk.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_off000075aa.bin
e06e9cbdeceade8515e63aeb8357939c0e9b824f4b0a40044a64400ac55bb2fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AA 5280 bytes
font_01_sfnt_off000087ae.bin
3a3c8a076dc7605537186aaa8d9246ef4eb0c15489fc40279df15c291fc5d8c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AE 10292 bytes

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