Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab45f8ad152f3485…

MALICIOUS

PDF

47.2 KB Created: 2020-08-30 03:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1503cd442f9a586c352ef7afe0100e6 SHA-1: 6d30eab71ea1f132eaf01dda46374e98c7314001 SHA-256: ab45f8ad152f34854f3d920582c9fff6c5f2d775ee90bc99abfcbb4c6982bffc
130 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=format+ssp+excel+2014'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on CDNs. The presence of a visual download button lure further supports a malicious intent. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the attack vector.

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.
  • 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/wix?keyword=format+ssp+excel+2014
    • https://static.usrfiles.com/ugd/2ac701_27780a8aec17400e8b64c8f856ad7adc.pdf
    • https://static.usrfiles.com/ugd/b8c837_a070c81b71a24ae6b21dd10e15ed75aa.pdf
    • https://static.usrfiles.com/ugd/8acad3_9ecad4c31219473eb6c063cd66d723dc.pdf
    • https://static.usrfiles.com/ugd/7ff653_48d58aa30f4140b3b804d6d7ac0046e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_db5ce2301eab471998b6d72e6d83ad04.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/ronorufevebaketib.pdf
    • https://cdn.shopify.com/s/files/1/0436/8154/6390/files/70502239813.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/hund_rule_and_aufbau_principle.pdf
    • https://cdn.shopify.com/s/files/1/0434/8215/3112/files/jasokevajebuviwodixemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/autotransformer_starter_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0463/6891/5617/files/libro_microbiologia_clinica_altamar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/baxukupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1832/files/shakespeare_mucho_ruido_y_pocas_nuec.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_off00006cfc.bin
9cf64a1e58f278bd544354fae3c1ab3dd274e19940d18c052676d60a87a34f19
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 5152 bytes
font_01_sfnt_off00007e8f.bin
d68f0fff41eed7c703509a681612e970e923495bacc29546a150f1918f015252
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8F 10420 bytes
font_02_sfnt_off0000a229.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA229 4324 bytes