Malicious PDF — malware analysis report

Static analysis result for SHA-256 706ad53e07a1e16e…

MALICIOUS

PDF

44.6 KB Created: 2020-08-08 09:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62ed606097b893e78d3fd51d27cc26a3 SHA-1: 3debc5b79442aa82762c6fb51537041171ade7a0 SHA-256: 706ad53e07a1e16ecdfd1321c1a84aedd619ce89478f52323e08c0b03d362616
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. This suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

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=exceptional+learners+13th+edition+pdf
    • http://files.dianalara-somatics.com/uploads/1/3/1/4/131438150/sinuboxusulogigutese.pdf
    • http://files.womensmetgolf.org/uploads/1/3/1/8/131871740/8368304.pdf
    • http://files.artlynchactingcoach.com/uploads/1/3/1/3/131380868/tagaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8466/7287/files/risk_assessment_steps.pdf
    • https://cdn.shopify.com/s/files/1/0450/1143/5670/files/treinamento_de_assertividade.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/vorofepe.pdf
    • https://cdn.shopify.com/s/files/1/0447/6986/9975/files/automated_trading_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/belisutej.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/vifatix.pdf
    • https://cdn.shopify.com/s/files/1/0450/2857/3334/files/boogie_woogie_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/lebinetalerikefumak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/dd_2896_1_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/16617435323.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/zafolukixorawax.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f47.bin
fa48c17f82490fce4a89bb166c74d41aea2f62745d5eccf9903e9316a4b41108
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F47 5484 bytes
font_01_sfnt_off000081f0.bin
8c65a5bdb4a2a4e7445ed3082fe8804b80cdd5549485e50ba4ee23ea04fbe9c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F0 10412 bytes