Malicious PDF — malware analysis report

Static analysis result for SHA-256 77230772f6576b6b…

MALICIOUS

PDF

54.8 KB Created: 2020-08-01 21:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4457a31e293aaaaffcee6de11ea8dc41 SHA-1: f42f74dbb2450b4476fffcd15ca6b093b61c54a0 SHA-256: 77230772f6576b6bdeac6cc597743db9bfcb3a96d77a7196f3b3168c9fa68079
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive title and numerous embedded links, including one pointing to a known malicious redirector at "ttraff.com". The heuristic firings indicate this is a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack, likely initiated via spearphishing.

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.com/pify?keyword=how+to+evolve+ninjask
    • http://files.esibstudentsfront.com/uploads/1/3/2/6/132695749/50518ed8a82.pdf
    • http://files.moruyaanglican.org/uploads/1/3/0/7/130776644/bobulime_zivuke.pdf
    • http://files.backyardbirdadventures.com/uploads/1/3/1/4/131406173/kowajuxejabub.pdf
    • http://files.bountifulpies.com/uploads/1/3/0/8/130874627/loxodedame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/8219/4852/files/17430883132.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/rovuxanejovujofuvizawunin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/dazogabogawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/fetaniwazibejopefi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/bozonikalapubinapot.pdf
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/metode_aashto_1993_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9000/files/39248035934.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/5058296796.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/bopevududex.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/lusovonope.pdf
    • https://cdn.shopify.com/s/files/1/0429/9046/9283/files/vopudirux.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b29.bin
49c4274087974c66771ae65c1c476eb9ce735a5a766c8ef783ef9f46358bb5a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B29 4376 bytes
font_01_sfnt_off00007a8a.bin
98d1431fbdbf99b435eb6646eac14fb93da30e9e8ef4a21f12c0f24a15558902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8A 4836 bytes
font_02_sfnt_off00008b18.bin
1b2552555645ba9c8fed0a9237ac9045cea52447ec583a08b5e706a61f045f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 6640 bytes
font_03_sfnt_off00009cd6.bin
4c70b918d898a452795776dfbe8dcb7091833b4c47259a66333c8990561c7753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD6 10312 bytes
font_04_sfnt_off0000c05a.bin
d4f4a45a95b330e441c2a1f99a9d19f85afbfcc475d62fc77ce8fa1b7417b3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC05A 2884 bytes

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