Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce3c7da9500506b…

MALICIOUS

PDF

41.2 KB Created: 2020-08-11 00:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97bf8577acd8375e77c3e66a4506b4a7 SHA-1: fc7f2bbf0a3821d62e75f1e42cedc71063e13761 SHA-256: 5ce3c7da9500506b982a8f63f4c263635330a29a77a606ba08988629641e4a63
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=bacterias+fitopatogenas+pdf'. This indicates an attempt to lure users to malicious content. No scripts were extracted, but the presence of numerous external links and the malicious redirector strongly suggest a phishing or redirection attack.

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.cc/pify?keyword=bacterias+fitopatogenas+pdf
    • http://files.liekeanna.com/uploads/1/3/0/8/130814588/bedaguxex.pdf
    • http://joxumasix.blossom-meditation.com/uploads/1/3/0/7/130775897/lokev.pdf
    • http://files.dollslakesidebb.com/uploads/1/3/1/4/131454345/35e5401a80894.pdf
    • http://files.cornellactuarialsociety.com/uploads/1/3/2/3/132303353/diwixofi.pdf
    • http://bifoki.pizzatomatecr.com/uploads/1/3/2/3/132303382/5675946.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/green_bar_paper.pdf
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/upper_intermediate_english_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1582/files/tuvowiwow.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/arabic_marsiya_of_dawoodi_bohra.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/morikozilotalagagovo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9637/files/watch_die_harder_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/26_brain_gym_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/vortex_bladeless_wind_turbine_seminar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/7003079085.pdf
    • https://cdn.shopify.com/s/files/1/0434/4292/9821/files/34031887499.pdf
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/19822868702.pdf
    • https://cdn.shopify.com/s/files/1/0434/8215/3112/files/mixexobezipepupug.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_off000062a0.bin
4aa6c51bf30b987aad4ee1432875f85b34214fa1d67f2e3f8d14d6ad65595de3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A0 5340 bytes
font_01_sfnt_off000074d0.bin
007a118bcf0b4a5ccc6e65afe49f2363f7e2d8d2393f9804a3b7b24bad395dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D0 10340 bytes

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