Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad69ec6e721496de…

MALICIOUS

PDF

51.2 KB Created: 2020-08-21 07:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8143f0da39743749e102c6a7535cc42 SHA-1: 92e40e66593571b097673ff30f33f37f529c897b SHA-256: ad69ec6e721496de53e4440f84fbd5d5d522c2ff3b2642af837d62b4aa48b7a4
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=shape+of+you+carnatic+music+ringtone`. The document body, though heavily obfuscated, contains this same URL and references to other PDF files, reinforcing the link farm tactic. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=shape+of+you+carnatic+music+ringtone
    • http://pozemeti.mmeconnect.org/uploads/1/3/0/7/130776106/2759012.pdf
    • http://files.nikpatellife.com/uploads/1/3/2/3/132303083/zupowetomubojo.pdf
    • http://jetolo.flatspokecycles.com/uploads/1/3/1/4/131405927/fae9e66130b2c.pdf
    • http://lejudif.jnhospitalityentertainment.com.au/uploads/1/3/1/4/131483378/be81c67a3c333.pdf
    • http://files.taborwatersolutions.com/uploads/1/3/1/4/131453252/97abca2d9d3db4e.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/demorifinotazijoxajakuma.pdf
    • https://cdn.shopify.com/s/files/1/0437/4455/9258/files/baradit_synco.pdf
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/dirorikomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/7057736456.pdf
    • https://cdn.shopify.com/s/files/1/0432/0457/5387/files/linutezivewisonuga.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/sistem_informasi_akademik_unsri._ac._id.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/fufabopujakofolozelesagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/ganevel.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/nidix.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/bridging_visa_e_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/biblical_eldership_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0451/3991/9001/files/napavagiwuruworofutox.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c77.bin
70a4a87c8294ca310485b050bb103ba5fb2de994cfee885f9d6e5c34f8834372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C77 5484 bytes
font_01_sfnt_off00006eec.bin
8836f6fcff90cd4d17be3feb52a79e7c91a05e8b3ce74b46f7afaaac41d44d08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEC 8800 bytes
font_02_sfnt_off00008c99.bin
a115127ee30597f107ac37eccd5cb0060abd14c7eda0da635f9c9e6da1d93d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C99 10628 bytes
font_03_sfnt_off0000b121.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB121 4324 bytes

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