Malicious PDF — malware analysis report

Static analysis result for SHA-256 7deb8015c6f39d59…

MALICIOUS

PDF

47.8 KB Created: 2020-08-03 18:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb2fa47870709a8f0b091051a855527e SHA-1: 1bd3b91fcba6797f2ec85a0fb5e4feb0e2419d17 SHA-256: 7deb8015c6f39d59248e71364b85c5109b68bf029d7fd21547ad7e57cc859634
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 malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text, though partially corrupted, includes the same URL found in the malicious redirector heuristic, suggesting the document's primary purpose is to lure users to this malicious site. No scripts were extracted from this sample.

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=alternative+careers+in+science+leaving+the+ivory+tower+pdf
    • http://files.innovationiseasy.com/uploads/1/3/0/7/130740013/vivinopa.pdf
    • http://files.mareda.org/uploads/1/3/1/4/131437864/e27fb8854540.pdf
    • http://files.bethlehemchristianmission.com/uploads/1/3/1/6/131606257/bofuxizovidili_pazeweviwulo_jonujibiji_bupidokokabo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/49312050841.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7327/files/50230601759.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/fojinenekikitubole.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9041/files/tupac_alben_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/36730960483.pdf
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/debisoxefetapofakixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/xanoxezuve.pdf
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/kabivotokanimunetipujobek.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3331/files/lafakevogejerijujiwamab.pdf
    • https://cdn.shopify.com/s/files/1/0431/8144/1181/files/53862029806.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/zuzezalozasafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/lavikexuxi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d9d.bin
127ff29f7c6047ecfa2cce98a6ba5f6541e053f401c5caec1bcaaa9294257055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9D 5448 bytes
font_01_sfnt_off00008030.bin
bb83d43a80b7883f37a2fc10476e9b6e0305037e41d38fe125d7980d75d32e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8030 10444 bytes
font_02_sfnt_off0000a3df.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DF 4324 bytes

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