Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b34238448746d08…

MALICIOUS

PDF

39.1 KB Created: 2020-07-10 18:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 261b232fb9414244492143ce095b3047 SHA-1: cc313823531f4f930185f1b853daaaa4e7172a74 SHA-256: 1b34238448746d0833efcb4072b565eb288ed8f07cc04cfa4aefd105c9f065bd
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.com, suggesting a link farm or phishing lure. The document body, though partially garbled, contains the same keywords as the initial URL, reinforcing the lure. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links points to a delivery mechanism designed to redirect users to potentially harmful 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.com/pify?keyword=complete+estimation+and+costing+of+residential+building+pdf
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdf
    • http://files.maidtoshineservices.net/uploads/1/3/1/4/131437268/29f33e.pdf
    • http://files.reallifelearning.ca/uploads/1/3/0/8/130874617/potibamonu-wanowojesuzegan.pdf
    • http://files.miracleinabucket.com/uploads/1/3/1/8/131871821/5924827.pdf
    • http://files.curetypeone.com/uploads/1/3/1/3/131380121/dadf492e7ec13e.pdf
    • http://files.chapmanconsultingteam.com/uploads/1/3/1/4/131406688/ea41f5f7d71e8e.pdf
    • http://files.langleycyberpatriot.org/uploads/1/3/2/6/132695851/teguvav.pdf
    • http://files.ms-wendys-class.com/uploads/1/3/0/7/130739311/4732321.pdf
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
    • http://files.mccormickcounseling.com/uploads/1/3/2/6/132696104/a5df64af13cbb44.pdf
    • https://zitexop.files.wordpress.com/2020/07/65655166954.pdf
    • https://dipirikufuda.files.wordpress.com/2020/06/nujujubagugazaz.pdf
    • https://nakaviditane.files.wordpress.com/2020/07/xozazopofepolededim.pdf
    • https://vixivid.files.wordpress.com/2020/07/12244504081.pdf
    • https://sezorez.files.wordpress.com/2020/06/numoraporo.pdf
    • https://rimiwel.files.wordpress.com/2020/07/mikiwibofiwufel.pdf
    • https://duxadaforege.files.wordpress.com/2020/07/kezipijinid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mukevomisuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/57770164236.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.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_off000059e0.bin
74c800a80280ef4b340eb2c49739e9223415e5a0213927b2de9382ddb2adcc61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 5520 bytes
font_01_sfnt_off00006c85.bin
4961da88797018e6252fa98902b7347d7fc6436edfe8a75639e7df1bc9693059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C85 9900 bytes

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