Malicious PDF — malware analysis report

Static analysis result for SHA-256 7761e9fdcaf7e00f…

MALICIOUS

PDF

46.9 KB Created: 2020-08-06 10:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 112e0a09bba4f3a0c0096cac177c51b6 SHA-1: 8b77d694394d1687734b45befa8cdc6ae699e59b SHA-256: 7761e9fdcaf7e00fea7974a52c7544b9094f30cf142a3618b4b64e31580db3b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a direct link to a known malicious redirector at 'https://ttraff.com/pify?keyword=mapa+tur%25C3%25ADstico+bilbao+pdf', indicating a likely attempt to lead the user to malicious content. The document body itself is heavily obfuscated but contains the same malicious URL.

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.com/pify?keyword=mapa+tur%25C3%25ADstico+bilbao+pdf
    • http://files.delawarehuskys.com/uploads/1/3/0/8/130814308/4108662.pdf
    • http://files.styleincluded.com/uploads/1/3/0/7/130740624/4445522.pdf
    • http://files.thefairiesoffarholt.com/uploads/1/3/2/6/132682790/40d378e4b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/96371835707.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/ritububafaruzibotoxepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/33111620641.pdf
    • https://cdn.shopify.com/s/files/1/0446/6681/4617/files/ncert_english_grammar_book_for_class_12_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/99431801761.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/kufomedofaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/farodowofekatewizaseze.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/dajisafazufipupugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9277/files/84822599465.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/mexasemenorezukanilovoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/godepibupulani.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/wifopasoxuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62374455636.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_off000069ca.bin
d17376d1764a22aacb0d23183af67dfc3081bd16c79eca7fe8ac5bb1a85844f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CA 5004 bytes
font_01_sfnt_off00007ad5.bin
5a607a2d0fa48834fcfaba7b18ed2247f4f06b0a2921686d7b8827b6bc671a05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD5 11076 bytes
font_02_sfnt_off00009ef9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF9 4324 bytes

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