Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ffc3275f5127d1…

MALICIOUS

PDF

55.4 KB Created: 2020-08-01 16:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb06be83b899cf7a7342a51c33328be2 SHA-1: ed73b2d3a8cb45d2fb78d61f727fee9562ce7630 SHA-256: 68ffc3275f5127d167bbd7a596de86318e307d4716804bdc86b4bda05d0c29df
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to drive traffic to malicious sites, likely for phishing or malware distribution.

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/pify?keyword=samurai+x+reflection+english+dubbed
    • http://files.killerhorrorcritic.com/uploads/1/3/0/8/130874169/bdcfd91b3c22.pdf
    • http://files.kamachiro.com/uploads/1/3/0/7/130739510/84b37bc0a8ee.pdf
    • http://files.victoriabmua.com/uploads/1/3/1/4/131406840/cc91d6e7c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/54667979098.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/88573142180.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/32036900611.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/xuxulan.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/gijiwurokerofewuxugogeli.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/69894662571.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/gileniri.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/36020740077.pdf
    • https://cdn.shopify.com/s/files/1/0430/5338/3833/files/50933585423.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/51918896894.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/degosuwefowos.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/mujatisekete.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/mabubolurawaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/sojujenuto.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_off000072ac.bin
ad205ca40835befab8d6e4d09c5bb8f3a475e4e0259b3f3e6e712ed1fd2eec88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AC 11368 bytes
font_01_sfnt_off00009835.bin
be44e03c3aae3bb601f17b896576ab5a02e96f5ba4baa5c6ac08d1ff87c96739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9835 5748 bytes
font_02_sfnt_off0000ab9a.bin
6c767552d8adcc310b48654ae54b394208282f28606f076eb2c02b88ec09677d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9A 10160 bytes

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