Malicious PDF — malware analysis report

Static analysis result for SHA-256 10248d6d140fe90b…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 10:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b45a120b2e3ecb99026291d088460b1 SHA-1: db861b238c4c94f48474fa25ff329d2a2efd23dc SHA-256: 10248d6d140fe90b634ab561fbf241c587cb5db42269407824e9e576d94a45d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the string 'https://ttraff.com/pify?keyword=google+arts+culture+app', suggesting a phishing lure related to a Google Arts & Culture app. The presence of many external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.com/pify?keyword=google+arts+culture+app
    • http://files.woodburyspeclass.com/uploads/1/3/1/6/131607600/bovovagudiz.pdf
    • http://files.deancipriano.com/uploads/1/3/1/8/131871414/0398654ef05b6.pdf
    • http://files.vertgrowsolve.com/uploads/1/3/2/6/132695995/afd58feb95.pdf
    • http://files.hopkinsseniorparty.com/uploads/1/3/0/8/130813514/4785117.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/85710939240.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/laniv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/aliquote_irpef_2018_scaglioni.pdf
    • https://cdn.shopify.com/s/files/1/0432/4727/2098/files/android_play_store_app_icon_size.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/bella_ciao_accordi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/48970806984.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/sowetokuvagugenoxer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0428/2384/3996/files/91299197124.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/assets_and_liabilities_format_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/dukawapometusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5733/2895/files/wordly_wise_3000_book_8_fourth_edition_answer_key.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066af.bin
bcbbbc683acb86615c90f463aad70d032055570c83f325e5c6a6257cb8aef4b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AF 4860 bytes
font_01_sfnt_off0000775e.bin
efa6ed045d5863b062ea9f4379a822c86770489736aaf875e0d4e1d9adf2decc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775E 10252 bytes
font_02_sfnt_off00009a78.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A78 4324 bytes

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