Malicious PDF — malware analysis report

Static analysis result for SHA-256 1910bd28ad7f94b1…

MALICIOUS

PDF

54.9 KB Created: 2020-08-29 22:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2e738a2e436230b5d11456978bd58d4 SHA-1: d7dc80f09866de37992810be552fd879a413291a SHA-256: 1910bd28ad7f94b1d3a90411d8ced65b156adc860d845d4e9c90016530b5f1bc
194 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.ru, which is a strong indicator of malicious intent. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' further suggests the document's purpose is to trick users into engaging with a scam. Although no scripts were extracted, the embedded URL is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/wix?keyword=literature+for+composition+11th+edit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/26915524585.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/dm_guideline.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/70140805212.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/german_accusative_verbs.pdf
    • https://static.usrfiles.com/ugd/b8c837_d45b111e88584da98dea72fcc6a5f0b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_15d5a2bcce5648acb1eb6306d6485cc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a577b5f71754a2ab3083b9f44f42d16.pdf
    • https://static.usrfiles.com/ugd/79e0dc_5520f5c9904c469bab8c6592bb97cd5a.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/android_10_gestures_pixel_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/30_days_minimum_wage_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/8951662588.pdf
    • https://cdn.shopify.com/s/files/1/0428/3885/1751/files/35256545794.pdf
    • https://cdn.shopify.com/s/files/1/0434/0200/2595/files/rarowonojib.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/52057395801.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_off000096d4.bin
0d83647c75a2bc876c5e39e4e893f1ecee0d527a0c2cb09f15915d04f9bd3888		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96D4 5356 bytes
font_01_sfnt_off0000a8e3.bin
1e67f1d2d325edeb35e6b0a15548af9e944312bba21b5b22f18f53ddd0b18c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E3 11140 bytes

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