Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb810776e11919b7…

MALICIOUS

PDF

54.7 KB Created: 2020-08-19 05:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3674179042de77338feca31f6a97b212 SHA-1: 5781ef87c9718aa3fed63c03f68cbb8e946b4ac4 SHA-256: bb810776e11919b70d33e1b8679240b7120fee94dfa9707b74d04c5ddc84fb49
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the lure. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=ab+inbev+2016+annual+report
    • http://togobe.caitlinshome.com/uploads/1/3/1/0/131070493/fimigewaf.pdf
    • http://pabel.skylinescotties.com/uploads/1/3/1/3/131381241/fotuvonojasero.pdf
    • http://files.emotionallyfocussedeating.com/uploads/1/3/1/3/131384777/juraramadasinasub.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/pivuwe.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/pathfinder_ultimate_wilderness.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/tutunodudisazidage.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/sosobebesevefadozukebame.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/minecraft_xray_texture_pack_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0439/1868/8424/files/92931388590.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/36710675028.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/7909139242.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/linguistic_typology_morphology_and_syntax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a2a.bin
01814e19d2bad0361dc4cbf1bb9b9c60d73d20d118887cbd45ecbedfed2133e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 14716 bytes
font_01_sfnt_off00009924.bin
d4758af4245339571129a4a55294baa14e680e38682b17a43cedc2d552abb329
pdf-font-stream PDF embedded font (sfnt) at offset 0x9924 5304 bytes
font_02_sfnt_off0000ab41.bin
baf3abdfb8574aab8bada653906e33099d6c846e83f6e24e2516404eb3e83ace
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB41 10128 bytes