Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86e5963639399af…

MALICIOUS

PDF

48.2 KB Created: 2020-08-06 11:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ebae6f36571176b0a7e6f2c5a4c3c7f SHA-1: 00a279df32a751c3e6df2f441a68fbadce3fe008 SHA-256: a86e5963639399afaea0a582a307e841f71f8f51dc3eeb75a2738419adb2118b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.001 Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains numerous embedded links, with a primary link identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Ielts writing task 2 model answers pdf' and the malicious URL. This suggests a phishing or scam attempt to lure users to malicious sites under the guise of providing useful content. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a deliberate effort to distribute malicious content.

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=ielts+writing+task+2+model+answers+pdf
    • http://files.gladpuppets.com/uploads/1/3/1/4/131437149/mefubotoxezo.pdf
    • http://files.makergrlz.org/uploads/1/3/1/0/131070674/1222928.pdf
    • http://files.boisdarcreations.com/uploads/1/3/0/8/130814907/427ac6aa.pdf
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/zofili.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/47498549492.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/pifupozesikolog.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/lesofewimamejozux.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5372/files/32212588708.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/87886958194.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/fogigenuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/58164006670.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/85975235142.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3835/files/understandable_statistics_11th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/4664/8473/files/karpal_adalah.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_off00007f16.bin
dad516c5ef015efb91e4ed274782757bbdbbbd7e0867d1f985781ab4b1721815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F16 5588 bytes
font_01_sfnt_off00009213.bin
500c72e6f8fcbd6ab21b5d0d3e59463efea34c1558ca67702ece38b64217ad5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9213 9892 bytes

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