Malicious PDF — malware analysis report

Static analysis result for SHA-256 07209e9bfd309e8d…

MALICIOUS

PDF

41.7 KB Created: 2020-08-03 09:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef135082547e1b39d686f25c26a38cc3 SHA-1: bda95f32cc7d8d5955d9c651b78081b913e4d4e2 SHA-256: 07209e9bfd309e8d1f07211a4de4cc2685d8e12972f6227993e200a15980eb5c
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text suggesting a lure related to software installation ('Install lspdfr pc'). The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent to redirect users to harmful sites.

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.ru/wb?keyword=install%20lspdfr%20pc
    • http://kavoz.themeditatingcowboy.com/uploads/1/3/0/7/130776131/filobodolon.pdf
    • http://files.gavindougan.com/uploads/1/3/0/7/130739112/nexuvugukik-vogelazapi-tidatojanox-kalupamowamisen.pdf
    • http://files.christchurchduanesburg.org/uploads/1/3/0/9/130969548/69706697ceb.pdf
    • http://files.friendsoftheriverbanks.org/uploads/1/3/2/6/132681767/7bee3.pdf
    • http://files.music.shenfieldlearning.com/uploads/1/3/1/6/131636843/tufow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/dixurizebomebe.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/xobaguvekojalutusumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3625/3087/files/geek_charming_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/76373425444.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/dababigotix.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/69083388904.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/53462132209.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/89458150570.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/74436114954.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/dawapipegu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4208/5783/files/92531598398.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/carlos_castaneda_the_art_of_dreaming.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/80638471916.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/89247282502.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/rufilugogoki.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_off0000660a.bin
d86840d2d43531abe62d9c6f85c66f1e5272c6d9e60ce9b3090dd556342b1082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660A 5088 bytes
font_01_sfnt_off00007767.bin
dad3029c964157d62e3559b01b58e3123a134bdbbdc5b31db9b3b417659b7cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7767 9872 bytes

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