Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78e6a8b76b2f147…

MALICIOUS

PDF

34.1 KB Created: 2020-08-08 01:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7690852c3cb16d41c01cacef69d70de5 SHA-1: 58cee21d2aec33557606fd0186ee38486caa5555 SHA-256: e78e6a8b76b2f147ad10b39b6c89a1172caf87bc56764be7dfe1656f674adebe
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=learn+to+speak+english+in+urdu+pdf+book+free+download, which is known to host malicious content. The document body text, though garbled, suggests a lure related to downloading a PDF book, which is consistent with the link farm behavior.

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=learn+to+speak+english+in+urdu+pdf+book+free+download
    • http://files.rachelbeckles.com/uploads/1/3/0/9/130969478/debumetemab.pdf
    • http://files.wdmoc.com/uploads/1/3/0/7/130775171/naxagetis-sojew-pubovogib-xazutolifa.pdf
    • http://files.nelecreativegroup.com/uploads/1/3/1/0/131070918/pogagojojolinag.pdf
    • http://gazaratab.locogringosstreettacos.com/uploads/1/3/0/8/130814297/vugimuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/33407778537.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/45914916907.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/zemadewuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/32991800363.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7218/4732/files/kasomawotedupid.pdf
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/xemejagopesosipiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/38390415728.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/nuwofavoso.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/52298253813.pdf
    • https://cdn.shopify.com/s/files/1/0428/1345/6550/files/inductive_deductive_reasoning_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/vugerepokevufivuvarudida.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/pomurigesoworetape.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_off000046c5.bin
572c88f2af7a662e2e3f91550451264f99bdc446a4423a778a60a9545fcc3fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C5 5540 bytes
font_01_sfnt_off000059aa.bin
c0c801d53ecc0164b406511868b24215d2842472dd8037d4d0df6352d6e664cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AA 9756 bytes

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