Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde805dadd34f9a2…

MALICIOUS

PDF

52.3 KB Created: 2020-08-05 11:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c7a73f4294515425261eca8119f7a8 SHA-1: 4861f9c8775a141d151b059767f9ebea294c05ac SHA-256: dde805dadd34f9a27bfc9b1b68b95952f63bc1f6ff0c6735a6fac5e67da85416
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.com/pify?keyword=the+copernican+revolution+kuhn+pdf'. This suggests the document's primary purpose is to lure users to malicious infrastructure. 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.com/pify?keyword=the+copernican+revolution+kuhn+pdf
    • http://files.potomacschoolrobotics.org/uploads/1/3/2/6/132681891/kanagub.pdf
    • http://files.emilyfuchs.ca/uploads/1/3/1/4/131483275/rusutuwut_gumudedikofege_lodewekur.pdf
    • http://worerapof.sweetbasilhurst.com/uploads/1/3/0/8/130874064/15de2c.pdf
    • http://jusafe.beastbeats.net/uploads/1/3/1/3/131397971/nizidof_buduve_sifop.pdf
    • http://files.friscoridersbaseball.com/uploads/1/3/1/0/131071289/kefazakuxuvakefa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8870/7733/files/37880462138.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0738/files/suwor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/8226072442.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/xigubipuzupoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/change_heroku_app_name.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9089/files/58218579280.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/pujemibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6850/5764/files/gegadotiwogabazas.pdf
    • https://cdn.shopify.com/s/files/1/0434/2228/5976/files/83067481647.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95936092566.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/24364373000.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/wupibarupur.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/jaradisodixukogiduga.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/xifewitewuzij.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/86388930179.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/
    • https://cdn.shopify.com/s/files/1/0

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ff4.bin
8fa43792ed16d21409a4c17c3a5af9aff86bf4de9f2c073af867f0a213ca2061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF4 5140 bytes
font_01_sfnt_off0000a174.bin
2885decc7bda6597228ba69e7425248d9bb24c3289a12384ef8baa148218c751		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA174 10076 bytes

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