Malicious PDF — malware analysis report

Static analysis result for SHA-256 8884731166456509…

MALICIOUS

PDF

47.0 KB Created: 2020-08-03 08:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14911957eac33a75d2cef098aab71442 SHA-1: afe8d87939680284b6112ad963af73946b23abad SHA-256: 88847311664565097aa98bde44e0d1e9d145552d015d8e6f68295e45553186d0
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a resume objective, which is likely a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm used for SEO poisoning or distributing further malicious content.

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=cna+resumes+objectives
    • http://files.supportbisd.com/uploads/1/3/1/8/131858540/1039494.pdf
    • http://files.londoncdt.co.uk/uploads/1/3/1/3/131379014/makonugomapufok.pdf
    • http://files.kelvingibbons.com/uploads/1/3/2/7/132740836/5145235.pdf
    • http://files.piedmontcollegewoodrowwilson.org/uploads/1/3/1/3/131380292/mimafokonesa-zebisa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/72522227005.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/84000772124.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0436/7797/4678/files/xebogemez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/kanenozudemisitagugopul.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/16161116181.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/86658176420.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/6385216917.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0111/files/niraw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/40982094672.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/xurif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0437/5475/0106/files/fupegikowuwelifupuzewefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/zerimujaziforusoladodage.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d21.bin
9aae18439327ab7f2a13a038c5f49f77346e3539d6d0b5a5ec3cbff685337a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 5092 bytes
font_01_sfnt_off00007e66.bin
0712185c45ba740b10507a73db455cda33953070fe324342c9f6e1e6047be911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E66 10028 bytes
font_02_sfnt_off0000a0b1.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B1 4324 bytes

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