Malicious PDF — malware analysis report

Static analysis result for SHA-256 44042076680a33ce…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 14:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6534dc6474f45304dbe85f6c47cf8355 SHA-1: 5f3bcc98d757fa26168f468a654cfd62f1668253 SHA-256: 44042076680a33cedc75e7fbc69bcae8c4970352e8256031de7b43795adb5a59
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=converter+chrome+html+document+to+pdf+online+free`. The document body, though partially corrupted, also contains this URL and other links, suggesting a lure to a fake converter service. The presence of multiple PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

Heuristics 3

  • 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.
  • 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=converter+chrome+html+document+to+pdf+online+free
    • http://dojuke.wildgingerdaycare.com/uploads/1/3/0/7/130776078/b06561278.pdf
    • http://files.shandryntrumble.com/uploads/1/3/1/4/131413362/xixegapejawepuro.pdf
    • http://wavafunob.sell-local.co.uk/uploads/1/3/1/4/131438641/2aeaef4de2d.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/hello_my_old_heart_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/50482365107.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/jatov.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/jazupopixuxotaxitenora.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/gilevivozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/lunasililemiwusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/vavatisirujofek.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/fesabokosaravinovow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/xipofumopikalogasad.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006114.bin
298f53e463b60b571bc6c9e63a33572cd0f9d00b024c5f23c742162930650813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 4972 bytes
font_01_sfnt_off000071db.bin
3373253af5df6918b7eb703b632f3fbd9e8ed619839ac52bfe1f20d9d96e35d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DB 10032 bytes

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