Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e233e365c91904a…

MALICIOUS

PDF

48.6 KB Created: 2020-08-20 20:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8c421b6a046be863c13dc23d431d456 SHA-1: 2766c3009e9927de793efe10a9f44c7b52e71310 SHA-256: 3e233e365c91904a4e02b0b456934c0c77e99c539c7c4107cc731ab8bd4d0e0d
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of embedded links, including a known malicious redirector. The document body contains text that appears to be a lure for song downloads, which is likely a pretext to disguise the malicious intent of the embedded links. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to 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.cc/pify?keyword=aafat+wapas+song++pagalworld
    • http://disapafup.rbkfreshfitfood.com/uploads/1/3/1/8/131856177/6969414.pdf
    • http://files.hubbymoments.com/uploads/1/3/1/6/131607467/menajagasuli.pdf
    • http://lalit.garybachers.com/uploads/1/3/0/7/130738765/fagirapin_xepoka_forubumazem_lipidisi.pdf
    • http://dejijopug.veritas-society.org/uploads/1/3/0/7/130739835/6506534.pdf
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/najomutufusisirawiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/10935551651.pdf
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/lp_pneumonia_anak.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/51102583268.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/dea_form_222.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/periodic_table_black_and_white_2017.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/zijulogav.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/jinarotobufiladavoxalaka.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/vimorapazawapuruxuwanutif.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/45691477449.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/logitech_z-_640.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/2163533227.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/6478908889.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/99117398882.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/becoming_self_employed_uk_guide.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_off00007152.bin
4d3c029db00c3533b80ec7e7ba9efb35083f3a0e37ef5ccd985d5025a87b6b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7152 5288 bytes
font_01_sfnt_off0000836d.bin
96c3a5060efa9c4038f223d917100e472df69eb3959b3c86330e0a860f057eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x836D 16212 bytes

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