Malicious PDF — malware analysis report

Static analysis result for SHA-256 838b11fd32be5a02…

MALICIOUS

PDF

47.5 KB Created: 2020-08-14 19:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5b6c307aec631daf7b225a44171ab18 SHA-1: e39266e93213f15cb95f27df3f0720436f4cf8a2 SHA-256: 838b11fd32be5a0217073df192c4e9a8360c4a0b6d02a29b763a28894c67a39f
194 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Florida voting guide 2018 amendments' and is flagged as an advance-fee scam. It also contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to a phishing or scam page. The presence of numerous external links, many pointing to Shopify, suggests a link farm designed to obscure the malicious destination.

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.com/pify?keyword=florida+voting+guide+2018+amendments
    • http://files.swimlongbrooke.com/uploads/1/3/1/3/131381612/tagaw-wuwofenajukira-nevananu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/gelapovikuminitumuwen.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6006/files/rexesurenopugalabobow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/taxup.pdf
    • https://cdn.shopify.com/s/files/1/0435/6882/4488/files/kenmore_freezer_model_253_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/bogibeel_bridge_photo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9564/files/very_hungry_caterpillar_lesson_plan.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/belaguw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2093/files/buddhism_four_noble_truths.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/parojuninupex.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/pepeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/14036057660.pdf
    • https://cdn.shopify.com/s/files/1/0449/8771/1656/files/ccna_3_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/37358792343.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_off0000664d.bin
db28a893d678cc560784bc97021989c7b7fd3b80cbd76c676456b72e2ce81499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x664D 5560 bytes
font_01_sfnt_off00007924.bin
e47d13f90890e41af3de79e000e3d6583778cf2af62d689858f345cc0d27e1db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7924 13228 bytes
font_02_sfnt_off0000a2ef.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2EF 4324 bytes

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