Malicious PDF — malware analysis report

Static analysis result for SHA-256 1272afea5612a9b0…

MALICIOUS

PDF

38.7 KB Created: 2020-08-03 08:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de8f106d27ac1ad82c23e10cd3938937 SHA-1: 852099cb733b81553789763685f858db7949aa0f SHA-256: 1272afea5612a9b0bf1d0b686b424bac791f76af8ed3478546a3bc314372f2e0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged the document as malicious. The presence of numerous links suggests an attempt to lure users to external sites, likely for phishing or to download 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.cc/pify?keyword=tropicraft+1.+7+10
    • http://files.mscalbanyga.com/uploads/1/3/1/1/131163684/c9d06e6a30f2e.pdf
    • http://files.nomadesgourmandes.com/uploads/1/3/1/0/131069789/sezulaveselamixud.pdf
    • http://files.squarecanvasart.com/uploads/1/3/0/8/130814124/nilonemajaxegij-lorisages-monijatixi.pdf
    • http://files.allennationalschool.com/uploads/1/3/1/8/131856619/5336644.pdf
    • http://files.haroutioun-derderian.com/uploads/1/3/1/3/131398424/c08560.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/xanunedujibitulejewiku.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/duzavekilut.pdf
    • https://cdn.shopify.com/s/files/1/0439/1341/2760/files/51775344111.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8259/files/gexirubunofetovukasokazot.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/95336095734.pdf
    • https://cdn.shopify.com/s/files/1/0430/8146/6005/files/51359713760.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/55380465707.pdf
    • https://cdn.shopify.com/s/files/1/0436/4340/4441/files/9592863417.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/36434434649.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/atwood_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/dagubagom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/mamurukege.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/onyxia_s_lair_location.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_off00005844.bin
52cbe01631caa3707ee5e3c46358ce07b87533ff545361bd66c699e1f69f262f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5844 5052 bytes
font_01_sfnt_off00006999.bin
551919b41453e981e1ecd5600e2d15016aab3afe562f5070b184eb667ae3e81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6999 10664 bytes

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