Malicious PDF — malware analysis report

Static analysis result for SHA-256 9569ae6f74b37b24…

MALICIOUS

PDF

42.5 KB Created: 2020-08-18 13:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4d5dd8b41e8141204131e709beff2e5 SHA-1: e45169fcd12244c36ae128a5a3d7798426a96f84 SHA-256: 9569ae6f74b37b24b5c54286e300d729ac00946610d4aaedfa44daa71ba49676
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, with at least one, 'https://ttraff.cc/pify?keyword=android+navigation+with+bottomnavigationview', identified as a known malicious redirector. The presence of a large number of embedded links suggests a delivery mechanism for phishing or malware.

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=android+navigation+with+bottomnavigationview
    • http://files.faharwest.net/uploads/1/3/1/1/131163540/48e678.pdf
    • http://files.bethmaries.com/uploads/1/3/1/6/131607943/wiruvoxujokefub_busepivugine_tupepupotu_jobuvidujuxeril.pdf
    • https://cdn.shopify.com/s/files/1/0438/4066/7798/files/mysql_connector_arduino_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9477/7760/files/87586809450.pdf
    • https://cdn.shopify.com/s/files/1/0431/8009/7687/files/39604151613.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/pivemivizisut.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/zojadijoxitufipumo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/jovipufiwegasujujowudu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/fuluzulipeno.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/zegaloporaguzoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/liste_d_adjectifs_descriptifs.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_off000067b4.bin
5e29307d1209b704d7c497a9a3f984c791c1612aa20ccdae51f6a8c3c887b554
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B4 5308 bytes
font_01_sfnt_off000079ad.bin
3c81077a89958265f2941a2083baaecf9d98c812e5aa7cb4d128879a3fce5f92
pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 10300 bytes