Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3beaabfb7640897…

MALICIOUS

PDF

56.9 KB Created: 2020-09-02 01:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b3427c9978f85df747619691c56b99e SHA-1: 350b595714a453ed3bd8743ffab3b9380d8bc4fa SHA-256: b3beaabfb7640897b33ae1e39b166bcaa44622b1f5d84e9ca0fff4009bad2faa
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign content, but one prominent link to 'https://ttraff.ru/wix?keyword=moviestarplanet+apk+ios' is flagged as malicious. This suggests a link farm or redirector strategy to distribute malware or phishing content. The document body itself is heavily obfuscated but contains the same malicious URL, reinforcing the lure. No scripts were extracted, and the primary malicious activity appears to be redirection via embedded links.

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.ru/wix?keyword=moviestarplanet+apk+ios
    • https://static.usrfiles.com/ugd/b8c837_972a347c37134841bd889e0d19d56688.pdf
    • https://static.usrfiles.com/ugd/8c0e65_2d464bbe77a4409d8852df774c7736b1.pdf
    • https://static.usrfiles.com/ugd/d5415a_2682446c2f6446e887168fce4aa4a6e9.pdf
    • https://static.usrfiles.com/ugd/35ddae_845bb0b88b1e453e82e291d239b449f8.pdf
    • https://static.usrfiles.com/ugd/e42ee3_4857a9a72c074a4b89e0ab38fa8311ec.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6513/files/8230750144.pdf
    • https://cdn.shopify.com/s/files/1/0432/4815/6835/files/pengertian_animisme.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/fedefirimobavuzifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/domaparedag.pdf
    • https://cdn.shopify.com/s/files/1/0449/1591/6967/files/charminar_express_secunderabad_platform.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/8168523983.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/40339294505.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/public_finance_management_system.pdf
    • https://static.usrfiles.com/ugd/86319b_e3d263f5f8f0485eaf79cf07fb75266d.pdf
    • https://static.usrfiles.com/ugd/b8c837_529e85e8eafa4c27acd767bef33f89b5.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_fb7e191e70f548a6b996066c1eec43ea.pdf
    • https://static.usrfiles.com/ugd/9a242c_0cc27f3055fb49b6874c57a9d0d5ae8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_595645a606b9452192fa9041e802d36b.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/
    • https://static.usrfiles.com/ugd/0e9fc2_fb7e19

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007243.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7243 6440 bytes
font_01_sfnt_off00008238.bin
b19665c43842fed18cb2ab2f4cdf1373732bbc048e475ab100fc357fdafd60fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8238 4940 bytes
font_02_sfnt_off0000931d.bin
52dc57ebe1b4860acbb2adcf64c9fd58ce96fffc0b8af267e529d8a3825d2bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x931D 2228 bytes
font_03_sfnt_off00009d69.bin
91707625fca28fcd9ee8f8c8139a71dae6562312068de741b35a8cc347ac93ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D69 10172 bytes
font_04_sfnt_off0000c060.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC060 16036 bytes

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