Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39a7a608e98de83…

MALICIOUS

PDF

65.0 KB Created: 2020-08-03 19:36:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b5a740e81a324ba209af0db6a06e53 SHA-1: a862f7d5878fcdc10d2923725b35726ff26cc834 SHA-256: b39a7a608e98de83fe669b9b2c88170141b080931268f95d103a27fbb5dadf0f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=emt+pipe+panasonic+catalogue+pdf'. The document body, though partially corrupted, contains text related to a 'panasonic catalogue pdf', likely a lure to encourage clicks on the embedded links. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=emt+pipe+panasonic+catalogue+pdf
    • http://files.english4apachs.org/uploads/1/3/1/4/131452958/simosenekitegal.pdf
    • http://files.integritydetailcookeville.com/uploads/1/3/0/7/130738894/wisigugadewivag-pizomagogomotuv-nowupod-lulurav.pdf
    • http://files.p3oriontopsecret.com/uploads/1/3/1/6/131636677/xomulijow.pdf
    • http://files.roundstoneponyshow.com/uploads/1/3/0/7/130775267/godik.pdf
    • http://files.kegoodrich.com/uploads/1/3/1/3/131384638/sobisalev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/53385579343.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/pabetipivoxopisebazafaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/ferokewedumumu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9534/9666/files/39246837718.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/47273638590.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/83697893123.pdf
    • https://cdn.shopify.com/s/files/1/0434/4528/9127/files/sunefagasudokufavofivijex.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/58928917462.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/ponutunesulebozewaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/ahuja_amplifier_repair_guide.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000955d.bin
d987ddcd5cda7a5acc803ef5b64ed7063227ef583ba6fa3904c14e8cca628c06		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x955D 12400 bytes
font_00_sfnt_off00006e09.bin
db84dc828c307954017c6efa653f1a1ee2d08224688496593eb2af0a27793a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 6480 bytes
font_01_sfnt_off000083bb.bin
196b760b056f0dc88316f262bdfed48bf2ae13ede5c4bee3a20e79531c3cffa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83BB 5220 bytes
font_03_sfnt_off0000b7c1.bin
5f3f5182163a0aadb9f29ea54e57f8a7421cdf9126da8188b865d93411d3ee27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C1 16568 bytes
font_04_sfnt_off0000e808.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 4324 bytes

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