Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c22b50c4277063c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 01:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434cb5dd77884b015e0f3adb3475380f SHA-1: 26392e1b16e2b0ba46025e4551b1dddd65c8de70 SHA-256: 8c22b50c4277063cf99968e3467d9b121c2465dbe6510b4dd60aab3ee39de71e
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking Shopify URLs. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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.
  • 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.
  • 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/pify?keyword=spongebob+squarepants+theme+song+clarinet+sheet+music
    • http://femosi.northlandwild.com/uploads/1/3/2/7/132712358/55c9d3.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/84102192940.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/dupaxonuwojakedefemazu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/begozegumar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3100/2264/files/cadence_orcad_17._2_crack.pdf
    • https://cdn.shopify.com/s/files/1/0437/8732/1505/files/93427121095.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/rezubuseke.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/29537479431.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7395/files/gakakama.pdf
    • https://cdn.shopify.com/s/files/1/0435/5384/9499/files/zoboximoselejaxip.pdf
    • https://cdn.shopify.com/s/files/1/0448/7141/8018/files/grams_and_kilograms_worksheets_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/vujetonet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1647/8110/files/jukigopavadif.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9208/files/lowes_cullman_al.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_off00006445.bin
e6f434ea97f337ef497986731a1e85bac98552a8cea66915d7d81acbfe399322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 5716 bytes
font_01_sfnt_off00007787.bin
c338be629c170e4f0b6ec39a44fa1be7e0e94c353cc4a2f8cd78bce3f15fe664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7787 10232 bytes

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