Malicious PDF — malware analysis report

Static analysis result for SHA-256 61740b62dcebed3b…

MALICIOUS

PDF

36.0 KB Created: 2020-08-23 20:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 061f32322ba0220b7ef8dc29f7854fc1 SHA-1: dc2113ae606dad168531deb43ed2bee6fd9029f0 SHA-256: 61740b62dcebed3b3d896f3cb77a3d22f95202f362116038e12d0639697b21fa
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking these links, which likely leads to a malicious payload or phishing page.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=holiday+office+party+flyer+templates
    • http://files.sevenskyexpert.com/uploads/1/3/1/4/131409037/wilatamoredilakekoba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2304/8610/files/peter_pan_real_story.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/28_day_boiled_egg_diet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/rurodix.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/riwoponasalov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/raxuzavagix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7927/files/pengukuran_biomassa_tumbuhan_bawah.pdf
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/tumodek.pdf
    • https://cdn.shopify.com/s/files/1/0448/3943/6449/files/85542787960.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/44400153880.pdf
    • https://cdn.shopify.com/s/files/1/0450/9194/6661/files/jquery_get_value_of_checkbox.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/spreadsheet_on_macbook_pro.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_off00004f69.bin
a429dd17ed585fc0f1aa990294ffd5fee73200600be635583ec780c7782125d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F69 5364 bytes
font_01_sfnt_off00006199.bin
31f4a6b8e95509bf294472b192b0a9334168312542ead55f6d6f759a57d63bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6199 9884 bytes

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