Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7129407106f5ca6…

MALICIOUS

PDF

40.9 KB Created: 2020-10-02 04:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 536812220db2aa09ffdc21f9f3993536 SHA-1: 19208075674957ee66cb76f0e1391975f3d0df99 SHA-256: a7129407106f5ca6866b61bae5b17552866842c4c895f7524a53398ea70e9e52
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, including one pointing to a known malicious redirector at https://ggtraff.ru/strik. The document body, though heavily obfuscated, appears to contain text related to educational materials, likely a lure to disguise the malicious intent. The presence of a malicious redirector suggests an attempt to lead the user to a compromised or malicious site, potentially for further exploitation or credential harvesting.

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://ggtraff.ru/strik?keyword=belajar+membaca+anak+sd+kelas+1+pdf
    • https://site-1039295.mozfiles.com/files/1039295/68327867726.pdf
    • https://site-1039391.mozfiles.com/files/1039391/60938223094.pdf
    • https://site-1036824.mozfiles.com/files/1036824/8059251990.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0476/4683/4854/files/basketball_world_challenge.pdf
    • https://cdn.shopify.com/s/files/1/0483/6157/0457/files/faux_stone_column_wraps_with_easy_install_kit.pdf
    • https://cdn.shopify.com/s/files/1/0483/9361/7559/files/2017_sea_doo_spark_shop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0485/6525/6357/files/varrock_museum_quest_guide_osrs.pdf
    • https://uploads.strikinglycdn.com/files/1000388a-0fa6-4452-9b91-f07579eed0ef/duvuwipudek.pdf
    • https://uploads.strikinglycdn.com/files/0d3b5670-07ff-407d-8dc4-cde0b9ba8953/10075443037.pdf
    • https://uploads.strikinglycdn.com/files/4d20159f-c428-4361-983f-52b76c64c059/80636649974.pdf
    • https://uploads.strikinglycdn.com/files/e1383500-7bfd-41c9-bd14-ff5505b2b71b/79250557414.pdf
    • https://uploads.strikinglycdn.com/files/cf13155f-f88d-4397-92ba-5900c45f47dc/518548440.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065aa.bin
e99fd4a92acda7f51d5ecedfe5e65795503658363170fbb0049b5a0da915370c
pdf-font-stream PDF embedded font (sfnt) at offset 0x65AA 5680 bytes
font_01_sfnt_off000078ee.bin
1cf6c6f534a282993fa80fd6895e1bd1d48bea8581616a561ea37f54da680edf
pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 9944 bytes