Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93ecc80655a6c3c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 13:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ac1763c3fe2a6d82d452e39ddc16170 SHA-1: 6db32c01bbb41a24a26e63dbd3871027fd2c9855 SHA-256: a93ecc80655a6c3ca75a603ba973ac14159d5b90d8ece28ccbf94429870d0e2a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to `https://ttraff.cc/pify?keyword=bronfenbrenner+ecological+systems+theory+pdf`. This URL is embedded within the document body, disguised as a link to an academic PDF. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a SEO poisoning or spamming campaign.

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.cc/pify?keyword=bronfenbrenner+ecological+systems+theory+pdf
    • http://files.unhbeelab.com/uploads/1/3/0/8/130814353/c373cf4.pdf
    • http://files.thefilamentstudio.com/uploads/1/3/1/6/131606035/fakesijerisaz.pdf
    • http://guraneta.justinefafara.com/uploads/1/3/1/4/131452903/1652812.pdf
    • http://tirolo.victoriacircus.com/uploads/1/3/0/8/130814124/2351881.pdf
    • http://files.mplboutique.com/uploads/1/3/0/8/130815014/jeroxotojebujatol.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/99476481575.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9714/files/57621105704.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2911/files/xabofawawa.pdf
    • https://cdn.shopify.com/s/files/1/0440/9711/0168/files/lao_tzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9879/files/winscp_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/rosetil.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/30266637170.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/20044861503.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/how_to_remove_bots_from_discord.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/calculus_book_graphical_numerical_algebraic.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/sobubuvuru.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_off000063f1.bin
ddb028ce74a452f4ff165d59d61f39cc6e5a05ad3bdf9e18ac0da395a10e6a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 5860 bytes
font_01_sfnt_off000077bc.bin
428c5a61728308763bad3c60ecf4dc15339a7a80e4dac62d0983a96322939819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 9940 bytes

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