Malicious PDF — malware analysis report

Static analysis result for SHA-256 870c0689fef49f0e…

MALICIOUS

PDF

47.0 KB Created: 2020-07-20 20:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cefcf0762029a8efc749541608d786df SHA-1: 71606df0332be088b378d3225927afc381b07b16 SHA-256: 870c0689fef49f0e0070e0ec51f591d6ab7162c34ffdcac6dbca0e5e487be7d0
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to a redirector service (ttraff.cc) and a link farm hosted on Shopify. This indicates a strong attempt to direct users to potentially malicious content. The ML classifier also flagged this PDF with high confidence, supporting the malicious classification.

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/wb?keyword=essential%20elements%20for%20strings%20viola%20book%201%20pdf
    • http://files.maydaystudio.com/uploads/1/3/1/6/131637546/162127.pdf
    • http://files.knowyourhair.co.uk/uploads/1/3/0/8/130814187/pujumuxosefuk_lazugivogilaw_jibiwobowa_womow.pdf
    • http://files.morjimcocopalms.com/uploads/1/3/1/3/131384789/2a0aea98a146c0c.pdf
    • http://files.richlandchurch.com/uploads/1/3/0/8/130874567/1368173.pdf
    • http://files.visitwesternheritagecenter.org/uploads/1/3/0/7/130738719/bagiramik.pdf
    • http://files.morjimcocopalm
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/68969413617.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/sixoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/34521733524.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/nenefunux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://tawumigudifo980931470.files.wordpress.com/2020/06/32878395093.pdf
    • https://wubewaritas.files.wordpress.com/2020/06/4991872570.pdf
    • https://kerejib.files.wordpress.com/2020/07/wojivezazuralozu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38692385895.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/21821422723.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/94220334898.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/zojelugegagadepepojovilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/42302342098.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/93380270533.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.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_off000078e1.bin
d5b8f680e4fdcf16ec383dcdff553d951e53db1468f22f5d5f6ec36809b0bc6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E1 5420 bytes
font_01_sfnt_off00008b38.bin
5f2cde7fbfd5a8bec57a1db5d8d1b3f27bad9382d997c234ab3ad9d4d0dc7022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B38 10096 bytes

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