Malicious PDF — malware analysis report

Static analysis result for SHA-256 11554982a8ae305d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 10:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f568adb9eaee142cb4ad5251e7078ab SHA-1: 5539095b6b76d4910df86b154e8af4d9a7a0873a SHA-256: 11554982a8ae305da356988cff328814059f4ed454fec6e1fa3114acf1255cd6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness, supporting this assessment.

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=bullet+background+paper+template+usaf
    • http://files.maplelanepups.com/uploads/1/3/1/4/131406537/dd4cf0d5a.pdf
    • http://files.evosilverstudio.com/uploads/1/3/0/7/130776641/tekibafega_zunugi_zoronedezimize.pdf
    • http://kefulu.mohairslim.com/uploads/1/3/2/6/132682883/192204.pdf
    • http://tadoneru.whiteplainslodge.org/uploads/1/3/2/8/132816042/2363122.pdf
    • http://kakuguwoz.thomasnazario.com/uploads/1/3/0/7/130775166/dexokokemud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17524121831.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1821/files/volenav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/kagutujapuvaxajabovage.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/51910660630.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/45249246243.pdf
    • https://cdn.shopify.com/s/files/1/0436/4877/8400/files/1079277101.pdf
    • https://cdn.shopify.com/s/files/1/0449/7843/8302/files/gizoxajewebezaxop.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6944/files/28277054103.pdf
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/ruqyah_shariah_by_alafasy.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/66067255262.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/pearson_pre_calculus_11_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/longman_dictionary_of_contemporary_english_download.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_off00006594.bin
5a03f01caf7eed01ef9559809ab25e53f78f3d40871cd5703fdffebf17f3aea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6594 5564 bytes
font_01_sfnt_off00007866.bin
de37ef91ac3e0d5379202344ec297952fa9b85ca5aed770b3fe786b4c38cb579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7866 10084 bytes
font_02_sfnt_off00009ad6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD6 4324 bytes

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