Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9af93d23030a44…

MALICIOUS

PDF

47.3 KB Created: 2020-09-03 03:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf35de3eeab26b2a60f11b8cbdf31066 SHA-1: 6ec033c8059f34186600aeb0d1c1d868050a599f SHA-256: bb9af93d23030a44ef9f835aeeeb491ea1228606ad0b26c5acc6a7378a2908ea
136 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One prominent link, https://ttraff.ru/pify?keyword=how+to+bypass+megasync++limit, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to bypassing download limits and includes the malicious URL, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+bypass+megasync++limit
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/botemijubekudefuwemov.pdf
    • https://cdn.shopify.com/s/files/1/0436/4442/0246/files/dikanunodubixorepomezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4431/5040/files/78670108686.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/gutemabaxirovebuguxawevi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/79445996055.pdf
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/vifivexizaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/10945011703.pdf
    • https://cdn.shopify.com/s/files/1/0434/2389/1618/files/wapur.pdf
    • https://cdn.shopify.com/s/files/1/0430/2258/1923/files/babupekanok.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5900/files/4002033783.pdf
    • https://cdn.shopify.com/s/files/1/0432/0473/9232/files/jumivimifozawusasidefulan.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/boxoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1018/files/salamizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/accrued_liabilities_classified_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/3045698854.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/griffiths_introduction_to_electrodynamics_4th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0463/6649/0779/files/abcd_book_ing.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/2729715301.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da6.bin
764c4fe52a2163e4896bb72b5d65ddaba82913b7b6dc5ff89cc9e8afe3ed010e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 5240 bytes
font_01_sfnt_off00007f6e.bin
103b3f31e91c2921cfa7f68b73fe77a1cbb6bf60f384d952ccd5e47031b5d883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6E 10084 bytes
font_02_sfnt_off0000a1f3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F3 4324 bytes

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