Malicious PDF — malware analysis report

Static analysis result for SHA-256 063893992e5f225e…

MALICIOUS

PDF

46.7 KB Created: 2020-08-18 13:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0af5a711840ebb8b3b3a83f29a363fd2 SHA-1: 76d81a9f920ffcf67158352ca120ca2e681533bc SHA-256: 063893992e5f225e9f6f08a165ff5bb42ae525a3930883a878da9ee67501bd9a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links, with one prominently identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains text suggesting a template lure, and the primary malicious URL is directly linked to this lure. The presence of embedded URLs and the ML classification support a high confidence assessment.

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/pify?keyword=conference+presentation+abstract+template
    • http://kipatani.bikramyogafremontstreet.com/uploads/1/3/0/9/130968917/zisekenogos.pdf
    • http://sizil.lauriannefiorentino.com/uploads/1/3/0/8/130874284/sekiwapuz_kururarup_tajelevimupixot.pdf
    • http://pedove.aspiraconsultancy.com/uploads/1/3/0/7/130739415/36b8e043e.pdf
    • http://files.greaterrefugeofdurhamnc.com/uploads/1/3/1/6/131606321/ffdda4e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/wofujuniwalakinovekone.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/figigoxudefisuvixuxolade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30551251375.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/plant_cell_lab_onion_and_elodea_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3408/files/60855384929.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/gogifonukase.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/44485566753.pdf
    • https://cdn.shopify.com/s/files/1/0438/8821/4171/files/jeremiah_was_a_bullfrog_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/sekekuxuxusewimadotumifo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007988.bin
379db1014164ba135301498f3549ca398a50703080765fbf7d408cf6a6516652
pdf-font-stream PDF embedded font (sfnt) at offset 0x7988 5208 bytes
font_01_sfnt_off00008b1e.bin
b8abf96f6ed435b1e9de9afb96c6a02027dd6e3816571a0e8a31c9d337caa0a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1E 10076 bytes