Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc5623c86e03ef2…

MALICIOUS

PDF

46.9 KB Created: 2020-09-16 14:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013a5c93b2c69b448ab50266635e1d31 SHA-1: 22c9d95e73c69f027a71e623296b2737b6d9e125 SHA-256: cdc5623c86e03ef21dc3f04725f69a7d82bd22cb596f180f93ec836ed94c94ef
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to direct users to a malicious redirector at `https://ttraff.club/wix`. This is further supported by ML classification and heuristics indicating malicious redirector links and a link farm. The document body, though heavily obfuscated, contains the same URLs, suggesting an attempt to disguise the malicious intent with seemingly legitimate content about coin collecting.

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.club/wix?keyword=cherrypickers%2527+guide+to+rare+die+varieties+of+united+states+coins+volume+2
    • http://debujixus.tailwinddelivery.com/uploads/1/3/0/8/130873998/minex.pdf
    • http://ranuwisul.dumlavwalla.com/uploads/1/3/1/8/131872096/rezugo.pdf
    • http://lotaj.ohiobudokan.org/uploads/1/3/0/7/130775841/ledunirefetozilid.pdf
    • http://files.kellyboyle.info/uploads/1/3/0/7/130739379/e0971ce9f6d0c5.pdf
    • https://22718d98-2d2c-4828-b0f0-0fd1887ec2a2.filesusr.com/ugd/f08e01_b4a35b42a3b44146aa1258568acb34ca.pdf?index=true
    • https://15fd6825-a00b-4f2a-8bfb-efe563c6b61c.filesusr.com/ugd/9c0842_92cccef11f2f4350ba1ff63d725c4ac2.pdf?index=true
    • https://6f674aaa-49d5-433d-bbbc-d80ac13ce4c0.filesusr.com/ugd/5bb01c_8cc418c986c748e19446d53d15298ade.pdf?index=true
    • https://1f7757ca-f808-11ea-a328-fc4dd43d38a6.filesusr.com/ugd/5ccfc8_84a2f4303a114b63840edb0748c495db.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/pobedom.pdf
    • https://cdn.shopify.com/s/files/1/0436/0192/0157/files/aba_english_premium_apk_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0463/4158/7100/files/linux_mint_kde_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/9468/6376/files/64855153641.pdf
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/bachelors_movie_2015_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/sound_recorder_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/kovenofas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006127.bin
a6ef301ce7bd7f59e357991cbe98a03084a7a8102a1f2a2dad30379ad859ff1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 5864 bytes
font_01_sfnt_off0000750c.bin
d75a3f336e628d430c8846084593d498aae3b4cb34ddcc3a5b87a4e9755d24a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x750C 10396 bytes
font_02_sfnt_off000098e6.bin
12e1bdea5fc73f205daff8bbc4573b4c6e5ba94205cf5b3440f65e61b625f0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x98E6 16084 bytes