Malicious PDF — malware analysis report

Static analysis result for SHA-256 411bd9433a3cdb36…

MALICIOUS

PDF

59.1 KB Created: 2020-08-24 08:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f330de49b13904de1cac6ffe40b2c6c SHA-1: 4da550ddf5aba66d7b28204750f2ff29196ac700 SHA-256: 411bd9433a3cdb3625dcebddd87d99a6cb5ff373f78e070e34af771d142bd478
152 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to shopify.com domains, but one critical link to 'ttraff.ru' is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning scheme, aiming to lure users through seemingly benign links to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=netbeans+for+php+development
    • http://rojasiz.mobilebeatzofcolorado.com/uploads/1/3/1/0/131069934/zorexotov_jigejopum_parapepinanura.pdf
    • http://sepodusi.thymesquareca.com/uploads/1/3/1/3/131380983/3398841.pdf
    • http://ginekuru.shoppingfortoday.com/uploads/1/3/0/8/130874426/verigutagunebuzeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64830269039.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/47964894546.pdf
    • https://cdn.shopify.com/s/files/1/0462/4413/5066/files/baal_veer_returns_movie.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/korobexuvikufutufinosizu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/fozulikaporogodimik.pdf
    • https://cdn.shopify.com/s/files/1/0436/2089/2834/files/bogoshipda_partitura_piano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0439/1940/9320/files/ispad_guidelines_dka_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/ropijutolafu.pdf
    • https://cdn.shopify.com/s/files/1/0450/1949/6606/files/mekubajetozakuta.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_off0000864a.bin
c0bfa2648c658fd1f975dceffb68c7b984094995787c472eab513a9c6b77ff30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864A 5192 bytes
font_01_sfnt_off000097be.bin
5004db91dabbb9b1f7a0a89d44d8425c1b5d131da1a9479104565befe6151905		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97BE 10416 bytes
font_02_sfnt_off0000bb99.bin
a4f616c8ed03231f927c8f6725ddfb6aed79ba1e9c0c9257d690ec40f184d4cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB99 16388 bytes
font_03_sfnt_off0000d128.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD128 4324 bytes

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