Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd590bb2743e950…

MALICIOUS

PDF

144.7 KB Created: 2020-08-15 16:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5652b03e8443297321ac657e72c3159 SHA-1: 7f69201e20fec48c0b4fcf1f6eed83007fb27ed2 SHA-256: bbd590bb2743e9507d972f09300263f2340a8796fb82c19526fecca00a4c67fc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm, with many links hosted on Shopify, suggesting an attempt to distribute malicious content or phish users. The ML classifier strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=assumptions+of+logistic+regression+pdf', is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=assumptions+of+logistic+regression+pdf
    • http://files.emshannonart.com/uploads/1/3/0/7/130739265/7266640.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/gabewokixafekezatolunesi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/24355101078.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/vegubudilusiwadejoworel.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/nec_2014_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/61028577921.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/fesibefuvidarumowetojug.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/vukikoleradugipubirifome.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/dolamaviti.pdf
    • https://cdn.shopify.com/s/files/1/0435/0764/6630/files/clean_code_by_robert_martin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/company_balance_sheet_equity_section.pdf
    • https://cdn.shopify.com/s/files/1/0437/2974/8122/files/traveller_rpg_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/46022699089.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_off0001c34d.bin
47556444656614e5a461fbf58e8ff5d662f2552046128417a2c763cabb95e4c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C34D 5252 bytes
font_01_sfnt_off0001d518.bin
043275fd08f61a242a3987e2d5cd46ead7ad3b0856b8812769e4fb4fd1355f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D518 8976 bytes
font_02_sfnt_off0001e6da.bin
8e599314f44586835f4eda914e5f182d7d70dc330550ff7b0cff6be21025febe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6DA 17156 bytes
font_03_sfnt_off00021d4a.bin
9a112d86a6f69b4235160965b00a0c9308e224169d3539c63b4974490dac4615		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21D4A 16568 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.