Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee00ce442044df36…

MALICIOUS

PDF

40.9 KB Created: 2020-08-25 09:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16170b8d92d0ac992883d520aad3220f SHA-1: bfac0c47077d913ef01de9d85863fa114f72e69c SHA-256: ee00ce442044df36ad5e8d92d36e7cca26f02e09dfcc81f8677066739fa8c8ee
152 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=spelling+practice+worksheets+for+2nd+grade', is identified as a malicious redirector. The document body is presented as 'Spelling practice worksheets for 2nd grade' to deceive the user into clicking the malicious link. The presence of numerous other links to Shopify PDFs suggests a link farm or SEO poisoning tactic to mask the 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.cc/pify?keyword=spelling+practice+worksheets+for+2nd+grade
    • http://denef.coloradocollaborative.org/uploads/1/3/0/7/130739415/rarawejipugigugenido.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2914/files/84420508608.pdf
    • https://cdn.shopify.com/s/files/1/0457/4520/9500/files/burda_magazine_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/73372108369.pdf
    • https://cdn.shopify.com/s/files/1/0437/5268/5720/files/art_style_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/vewurijovuvafogaritez.pdf
    • https://cdn.shopify.com/s/files/1/0432/1578/2045/files/brinkmann_pumps_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/11192434512.pdf
    • https://cdn.shopify.com/s/files/1/0432/4006/3143/files/vibikosesave.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/dl_44_application.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/28705601900.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/43421416956.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/robifiduraze.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/kemelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1447/files/java_avl_tree_implementation.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_off000060b8.bin
6f14842511c3114a825fd50e438b2c9e867a1f12c4c3681ccdcc1ad2231cf5bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B8 5808 bytes
font_01_sfnt_off00007482.bin
71daf9bfe7f5355b6c1b4cae40b5312664af61dcd6c642420f33d2e037f617d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7482 9980 bytes