Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2dfac248407708f…

MALICIOUS

PDF

47.3 KB Created: 2020-08-03 11:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a406222bd2de9c8d502db482fe079e12 SHA-1: 50c5c0d9ece2eb5dc09ed20f2858a94e194a1258 SHA-256: a2dfac248407708fd4cfc2c72236d7811573826491234236e3dfe9143e6043f5
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL and benign-looking PDF links, suggesting a lure to trick users into downloading potentially malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=beginning+programming+with+java+for+dummies+5th+edition+pdf
    • http://kobev.shoalbaysportfishing.com/uploads/1/3/1/0/131071157/tidori.pdf
    • http://files.memorialvocalmusic.com/uploads/1/3/1/4/131408432/ruxogipet-nosexate-juromigiri-sulifepes.pdf
    • http://files.necsema.net/uploads/1/3/0/9/130969663/e66424be.pdf
    • http://files.fundle.us/uploads/1/3/1/0/131070331/vozafanusabakis-faviw-kopuminudil-gipumujuno.pdf
    • http://files.wraparazzi.org/uploads/1/3/1/3/131384359/9059944.pdf
    • https://cdn.shopify.com/s/files/1/0434/3899/7669/files/68534808320.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/pugezenamekivapebomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3840/files/guvaji.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/90598212766.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/gididitelikimek.pdf
    • https://cdn.shopify.com/s/files/1/0431/4588/7905/files/vixifik.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/35085292256.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/40943113760.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/94850905503.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/mivugezinezas.pdf
    • https://cdn.shopify.com/s/files/1/0440/3331/0870/files/vogugovadefepaza.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_off00007677.bin
033c0b1292976ae8fef683a081e8fd167e2984927e204059bf89755778779c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 5824 bytes
font_01_sfnt_off00008a49.bin
6f27f6cedd9536435eb7c5c9520d0ab2b5c25323deae517116a23fdd13e1d2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 10896 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.