Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecdd95b892bfa91…

MALICIOUS

PDF

41.8 KB Created: 2020-08-20 18:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a4700a8a3e54fc8c8e713cbdba94301 SHA-1: 69a0df0943757a3caeaec08fb9b61c6389f7e691 SHA-256: 8ecdd95b892bfa91ed62acbcc5a281ad774a0566bb5feb360641f42e1c52132a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily corrupted, contains text related to a 'Blomberg ldv42244 manual' and the wkhtmltopdf application, suggesting a lure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=blomberg+ldv42244+manual, which is likely used to redirect users to a malicious site. The presence of a link farm heuristic further supports the attack pattern.

Heuristics 3

  • 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.
  • 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=blomberg+ldv42244+manual
    • http://duwodak.a-mel.co.uk/uploads/1/3/0/9/130969627/e8516e5e101e.pdf
    • http://files.jaycountyrobotics.com/uploads/1/3/2/6/132681409/rutopozuged_wobabujamajepu_zodimewuxive.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/bhagavad_gita_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/bitesotimeguzapavutureko.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/fable_2_siver_keys.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/bubovojonewafeso.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/4016848003.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/brchen_addition_und_subtrahieren_bung.pdf
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/beating_the_streets_by_peter_lynch.pdf
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/css_for_mobile_devices.pdf
    • https://cdn.shopify.com/s/files/1/0431/8861/7378/files/litizuwuxisaxolir.pdf
    • https://cdn.shopify.com/s/files/1/0434/4869/6993/files/adobe_scanner_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/53855660060.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/58802186279.pdf
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/83043998562.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_off00006550.bin
0bdec2a51913cd1ae69f4e7f2eec6a0493490393bad684c89d2f8abb5201feb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 5436 bytes
font_01_sfnt_off000077c6.bin
eb4933551d43834aafc8335a64dffa830f44abecbc4f420bf4efb85826da9efc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 10160 bytes

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