Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fc41ec8bb908e9…

MALICIOUS

PDF

60.7 KB Created: 2020-08-11 13:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e7ba54fea32658428a5f888bc4a964f SHA-1: 26ab4f7c976de6203123d791ca90a1a7a3422d1b SHA-256: 10fc41ec8bb908e961ab5f50c077e6d894e02c9119a906ddd0d5eda376d99fb7
194 Risk Score

Malware Insights

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

The PDF contains a lure for an advance-fee scam, directing users to click on links that lead to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains embedded URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=blackstone+fortress+escalation+pdf+vk
    • http://files.lifenuts.org/uploads/1/3/2/6/132683154/korulugi.pdf
    • http://relulivi.danielshrigley.com/uploads/1/3/2/7/132712207/gofulomud_fisamoguzipa_fekevedozadavel.pdf
    • http://files.imperialplugs.com/uploads/1/3/0/7/130775490/103198.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/dujexabajapijigakepemebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/convert_latex_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/petapadajawodagagatefadez.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/history_of_broadcast_media_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/wimavuvaseba.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/pusisorozepozezupexo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/10686805648.pdf
    • https://cdn.shopify.com/s/files/1/0437/4849/1425/files/lines_of_symmetry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/30843584517.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_off0000a316.bin
158bf63d17c704b8c5c3b3a86d084a1eb02194911e0124367b5733adf8a9820b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA316 5112 bytes
font_01_sfnt_off0000b483.bin
d0d1c7278df1855192b472dece9af8dd3a56728f1303d92110c5016e2530a481		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB483 10356 bytes
font_02_sfnt_off0000d7bb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 4324 bytes

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