Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55679df2e5ae699…

MALICIOUS

PDF

51.8 KB Created: 2020-08-10 19:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 812e299186e86a9fdc8d0bccca1455cd SHA-1: 8eb22d15b5aa5130a30c128853ff20cd943a189c SHA-256: a55679df2e5ae699e6553b249d6a6def3cba5ebd9d18ac9c247413b885683f4c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially garbled, suggests a lure related to 'Java struts interview questions and answers pdf'. The presence of a mass external PDF link farm further indicates a malicious intent, likely for SEO manipulation or to direct users to malicious sites. No scripts were extracted from this sample.

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.com/pify?keyword=java+struts+interview+questions+and+answers+pdf
    • http://kupegoz.margaretshiver.com/uploads/1/3/1/3/131380213/ed29972.pdf
    • http://files.humactive-formation.com/uploads/1/3/0/9/130969984/ziraxo.pdf
    • http://besak.kasiaclarke.com/uploads/1/3/0/7/130776791/zavuliwit_lazokiba_sijiduligiv_wajagod.pdf
    • http://visemix.majesticrc.us/uploads/1/3/0/8/130813528/silarefuzizig.pdf
    • http://files.lilrascalsrefuge.org/uploads/1/3/1/6/131637279/4781478.pdf
    • https://cdn.shopify.com/s/files/1/0439/7246/0702/files/sony_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/4223/2725/files/xiwut.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/mubanizopatenumudogeziw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/ralirifir.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/zetomowuxofejer.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/zavatudiluw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3702/2615/files/zanivujojegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/lajidipowolalogedaguko.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/xoxatid.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/14787840131.pdf
    • https://cdn.shopify.com/s/files/1/0433/6841/5400/files/digijomaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/treatment_of_chronic_liver_disease.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_off00007fc8.bin
dbb531a15f26df2fba991fc1186a681628f0c18daabc6e27e38f3437e05a0cb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC8 5268 bytes
font_01_sfnt_off000091d9.bin
4f7b66046e4a7e61d890fc3fcff020f7aef04831d11ba5412a9decdeca25eb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D9 15484 bytes

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