Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef92471628d386c7…

MALICIOUS

PDF

47.1 KB Created: 2020-08-07 05:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 463446d45671c68e9c4609c6198580ef SHA-1: c50688d691714b3f18203921ac9fa670b0b7d4e0 SHA-256: ef92471628d386c77856086184ef38f51928f6800170757eaa22484f5460912f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'cessna 172 electrical system pdf', suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links indicates a link farm strategy, likely to improve search engine ranking and distribute malicious content.

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.com/pify?keyword=cessna+172+electrical+system+pdf
    • http://files.danceology.ca/uploads/1/3/1/4/131406527/305c18c8cefd1d.pdf
    • http://files.parishat.com/uploads/1/3/2/7/132740637/pajedaxopa.pdf
    • http://files.overlandgamer.com/uploads/1/3/1/4/131437864/25c5f5e66eee197.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/89748743695.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/sadosuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/18576450143.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/60089697115.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/nabobiromanibe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6045/9685/files/que_es_modelo_biopsicosocial.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/nesozezobademumavujokunin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/92983580384.pdf
    • https://cdn.shopify.com/s/files/1/0431/6846/5053/files/55092766224.pdf
    • https://cdn.shopify.com/s/files/1/0433/8663/4390/files/taiwan_subway_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/17307380576.pdf
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/rolorosazomaz.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_off000073b3.bin
24e30048714a8e9966c4d062d2a2e550000bd823f90c3823227ea87e077cd4b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B3 5572 bytes
font_01_sfnt_off000086a6.bin
8b7bc431bc423e6594cb0c94e230352284bf305ce77a421ae106332908b33fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 12468 bytes

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