Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05a9caad19860de…

MALICIOUS

PDF

44.4 KB Created: 2020-08-31 10:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ff18d9e1d1f253deea1dd66c0c4084 SHA-1: e2c154e7f237bb6b106fc3fe628e0e8790b26ca3 SHA-256: b05a9caad19860de96ba328edb541dc577e526c1533dd7002a64a0ffbbdfa131
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One of these links, https://ttraff.ru/wix?keyword=wonder+tactics+tier+list, points to a known malicious redirector. The document appears to be a link farm designed to direct users to potentially harmful content, leveraging the benign reputation of shopify.com for some of its links.

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.ru/wix?keyword=wonder+tactics+tier+list
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/54781911402.pdf
    • https://cdn.shopify.com/s/files/1/0429/0455/1590/files/bosozavelenobemak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/blueberry_form_filler.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/migifarid.pdf
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/juxafopuzenuzazofe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/ripan.pdf
    • https://cdn.shopify.com/s/files/1/0440/4304/2966/files/37449228616.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/benedict_s_world_tour_rs3_quick_guide.pdf
    • https://static.usrfiles.com/ugd/9757e7_d4eb62928c2642019ac12a1e324e16c8.pdf
    • https://static.usrfiles.com/ugd/4bb894_c75b711747824fc6a464a75f99bfcf89.pdf
    • https://static.usrfiles.com/ugd/b65acf_137109532dab4a7f861b95667e12f86a.pdf
    • https://static.usrfiles.com/ugd/73c254_485d7a4355be4b3f8d7df5287754b2b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2bbc7df612f44b98b4b924f4a1a7a61.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a4c71da2b7344d285032b6f52991236.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_off00006340.bin
14b937fd6cfa439c747cdd84c1792b9534d5a2e50f84a3d1a1106e3796ac3a71
pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 4736 bytes
font_01_sfnt_off00007362.bin
0e51706cc62886d93ea35a75f60fb616af5619ee0e796d159ec48853042842b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 10672 bytes
font_02_sfnt_off0000971c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x971C 4324 bytes