Malicious PDF — malware analysis report

Static analysis result for SHA-256 197e4bb57df94215…

MALICIOUS

PDF

46.1 KB Created: 2020-08-10 02:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ad4a4c1abccc5c8c54dd034d411e6b SHA-1: 8bdf76dacd1fb4a428869bcf0135e1b17dc3b5ec SHA-256: 197e4bb57df942152d29fa5d8995f986f15d328b07b6ed50892efe2cd01d9e92
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO abuse. The document body itself contains the malicious URL, reinforcing the redirection attempt.

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.com/pify?keyword=delitos+contra+la+administracion+publica+pdf+colombia
    • http://files.tigerhillpermaculture.net/uploads/1/3/0/7/130776728/288e977fe85057.pdf
    • http://files.alexcarterla.com/uploads/1/3/1/3/131383619/7162327.pdf
    • http://files.mrandon.com/uploads/1/3/0/7/130776254/ribagijejebakufetafi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/18709586122.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/martyrdom_of_rizal.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/linagejodamoruwer.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/cdfipb._careers_guarantor_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/bangladesh_bank_job_preparation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3031/files/natemizagaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/80253725311.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/three_skeleton_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/55134567099.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/mini_jambox_app.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/51927010937.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/dalukezafejabubuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/zobomotefuzapidakewefoxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ce.bin
e713a167bb02dd300de81d9647c145309d7f9ff2faf5393ba87bd4204c0471e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 5320 bytes
font_01_sfnt_off000079c3.bin
c9b65d550d7dedcb224f42b4040995a35fc779eeb7d3fdfa07689f58b9e1c6bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C3 10264 bytes
font_02_sfnt_off00009b30.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B30 4324 bytes

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