Malicious PDF — malware analysis report

Static analysis result for SHA-256 082954ff293629d8…

MALICIOUS

PDF

43.1 KB Created: 2020-08-09 04:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b3b62229c35848b7436d9a6da6c0d85 SHA-1: 00f0b1075624ba2df2b6b8fdfbc9cba68308d00e SHA-256: 082954ff293629d881a254ede454f2a93e55e536568ed87257b9fbdd9fcf08ee
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a tutorial. This suggests a phishing or malware distribution attempt. The document also contains a large number of links to other PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate malicious intent.

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=bash+shell+scripting+tutorialspoint+pdf
    • http://files.lifeandentertainment.com/uploads/1/3/1/4/131454766/gozojaziwib.pdf
    • http://files.gcchapel.org/uploads/1/3/1/4/131482823/6d46af06e0ff.pdf
    • http://files.theegote.net/uploads/1/3/1/6/131636655/gumupotarige.pdf
    • http://files.seaquamseahawks.com/uploads/1/3/1/3/131380158/2329242.pdf
    • http://misoxewug.irminenschaft.org/uploads/1/3/1/3/131398140/budibafuvufamij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4366/7616/files/fijepodaduj.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/vubusaxaweletune.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/55536930825.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/misetuwejolimilugoto.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/48290167061.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3366/files/digosalaselirejogafuwad.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/janikusenerovefijokadi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8758/5699/files/5796358141.pdf
    • https://cdn.shopify.com/s/files/1/0433/2994/5758/files/vumudagupisilafawoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/threat_level_2_tempered_monsters.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/91256378045.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/swka_angielski_poziom_b2.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_off00006758.bin
adc49aa37f5ada32d3892e6117c60c459ef622fc6a0590d40ba2a5c93b880944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6758 5468 bytes
font_01_sfnt_off000079ec.bin
ad7ed8699690c789c59552ea8a6b276cf1fbb663dfef8466436e7ea05e515dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EC 10944 bytes

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