Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b8b6e98d25cda34…

MALICIOUS

PDF

50.1 KB Created: 2020-10-30 16:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6943923f2d018ff5fd293649bee13abf SHA-1: b34f49e90fe327218db583e6a55f67a642f58004 SHA-256: 8b8b6e98d25cda3440477c266a1ab26f35179787fe5e2f39804a45493955da64
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/aws?keyword=base+building+games'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, indicating its likely purpose is to lure the user to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/aws?keyword=base+building+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f8f8c3627552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5f91fe82d1db4.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/1629124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f97507b28d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f900d3c94495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3120/2472/files/bitinizutoborudaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/65000197945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9290/7432/files/janarete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8714/2295/files/52853469488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2154/7713/files/pudelule.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7767 4932 bytes
SHA-256: 17a945c40d0ef9c4464810e8a5893fd960c36094708c220bc4ca843a13a2af70
font_01_sfnt_off000087fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FC 11088 bytes
SHA-256: 5057940ddb86de16c40536adc1550a291074d96357a6e7f83490ec5e3dfec390
font_02_sfnt_off0000adc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e