Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2f033cbd8432c3…

MALICIOUS

PDF

50.0 KB Created: 2020-08-29 11:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f9366808d5600e55631399e3ee9e5b8 SHA-1: bc639c60d639859370731411de7fa8b265c05c5b SHA-256: 1b2f033cbd8432c32f7a9b4c5440ee9634bd2d1549ac8535cc626edbf9d897da
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'easy bake oven scone recipes' and the authoring application, suggesting a lure to disguise the malicious link farm. The primary intent appears to be directing users to potentially harmful external sites.

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=easy+bake+oven+scone+recipes
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/diphyllobothrium_latum_ciclo_de_vida.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/5e_rogue_multiclass.pdf
    • https://cdn.shopify.com/s/files/1/0465/0106/8958/files/zofawusugif.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/casual_leave_form_kerala_govt.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/rukolukowogugegoxij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebisineseboji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/jofawiwedowojogubel.pdf
    • https://static.usrfiles.com/ugd/b8c837_464caf8764254d4f9b7d54c1c6813de3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e510edf8cf6d48fdbf3b70020f690bef.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ab2000b8d6042e19db345e48f2bcbda.pdf
    • https://static.usrfiles.com/ugd/b8c837_4800460511a947e4977b95ecaccd2a00.pdf
    • https://static.usrfiles.com/ugd/b8c837_758c2b7f06cc41bfa13a33e69335c60d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57379697448.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/44564159431.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063b1.bin
c9d647400ceae420f6afdfe45014eebdde8cc97eaeae723ae9add41560600812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B1 4928 bytes
font_01_sfnt_off00007478.bin
dfd6776254dac256525358f342171cf56bf5c0418bfde0b4a15e44c8dc3db6d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7478 10060 bytes
font_02_sfnt_off00009724.bin
760a9d3727253f25105bb1fc64edf994238303adea0153ebc8498db2c5f4fef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9724 16376 bytes
font_03_sfnt_off0000ace8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACE8 4324 bytes

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