Malicious PDF — malware analysis report

Static analysis result for SHA-256 781fde1070871bc2…

MALICIOUS

PDF

35.6 KB Created: 2020-08-02 17:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd8fc8fc97740411d775994115880403 SHA-1: df926f143dbdfd0abcd4e373a859838f7df4ead6 SHA-256: 781fde1070871bc2430f04c8f513736ff7272de34887d06bebac478e52180a7e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.com'. This suggests the document is designed to funnel users to malicious infrastructure, likely for phishing or malware distribution. The presence of many Shopify-hosted PDF links, some flagged as benign and others unknown, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted, but the embedded URLs and link farm behavior are strong indicators of 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=lds+seminary+manual
    • http://files.countrysquirewinery.com/uploads/1/3/1/8/131856627/b09c9.pdf
    • http://files.gruffcorn13.com/uploads/1/3/0/9/130969728/9042446.pdf
    • http://files.dryvettefit.com/uploads/1/3/1/8/131856904/5979593.pdf
    • http://files.ambiancegardendesign.com/uploads/1/3/0/8/130814960/67164080406.pdf
    • http://files.colorfullcreations.com/uploads/1/3/1/4/131455636/banotugizo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4023/4917/files/hp_pro_3500_driver.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/movofarova.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/26816944911.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/unity_instantiate_as_child.pdf
    • https://cdn.shopify.com/s/files/1/0436/0237/8915/files/zotapiwipupuveno.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/82275559265.pdf
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/85125194517.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/53115148345.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/nulejagawoked.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/24769997735.pdf
    • https://cdn.shopify.com/s/files/1/0440/5703/4902/files/nudibutatejoseku.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/fupebesewejakilopiwug.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/73978016314.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_off00004c20.bin
c68c78ef76b8fa44a6a2a09e3a1a1578512ab3ad589949eab05ca06e03f1691b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C20 5012 bytes
font_01_sfnt_off00005d18.bin
5abff2a43b5434621ad3355bb91fcf8cc2bcb87e2de4251797fcbd3d0907e809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D18 10772 bytes

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