Malicious PDF — malware analysis report

Static analysis result for SHA-256 95049415b68ad387…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 09:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a11f3345da0d7b42d9dbe5e854c7fb5 SHA-1: 39c8c7f9ef4c9fb96bb99eff7cfe1ca2ffefa0ee SHA-256: 95049415b68ad38784cbc6eb07642da7bde48d7af77d2b735867137638a650bc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=remove+duplicates+excel'. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to Excel functionality, likely intended to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=remove+duplicates+excel
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdf
    • http://files.leadershippasadena.org/uploads/1/3/1/4/131483025/pukoxisiv-wunuguzop-bolot.pdf
    • http://files.matsumastergardeners.com/uploads/1/3/2/7/132740172/wanovulapil-sowukunaze.pdf
    • http://files.coderecs.com/uploads/1/3/1/4/131437464/0e53ab427935c9.pdf
    • http://files.pawsrehab.net/uploads/1/3/0/8/130873958/suvatagetage_pukuzena_ziwikodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1919/files/da_form_67-_10-_1a_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/19160987631.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/josejubanikenewol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/xanugobifaworopaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3416/files/21748995580.pdf
    • https://cdn.shopify.com/s/files/1/0437/8732/1505/files/jemix.pdf
    • https://cdn.shopify.com/s/files/1/0441/2017/8840/files/49406969559.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/89705618746.pdf
    • https://cdn.shopify.com/s/files/1/0437/2578/3190/files/sonegowabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19227598733.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/fulavejasojobunugido.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bbe.bin
fead047c4ecf8edaefff1fb24a3d8d3df713596d0366c2969652d7ea518047cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBE 5256 bytes
font_01_sfnt_off00007d9d.bin
4a3ceab368d75e9a06ca88864841a63ffaa18406d8c6f213597d66e64874b505
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9D 10040 bytes