Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea877db84e2a6116…

MALICIOUS

PDF

42.6 KB Created: 2020-09-01 10:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9466e6948e3eb8f416724c2c1ecd1fe SHA-1: 696c2164fb4b3236668008c5aebf73e8d77e9f98 SHA-256: ea877db84e2a61167b792cc4c8c66e1b07c52cfc09ceebf6481f023b7515fc28
152 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a 'Safety induction report' that redirects to a known malicious domain, ttraff.cc. This indicates a phishing or social engineering attack aimed at luring users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector link is a high-confidence indicator of malicious intent.

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.cc/wix?keyword=safety+induction+report
    • https://static.usrfiles.com/ugd/a18aa6_b432911ae8074b6da3dee5e33af7f1f6.pdf
    • https://static.usrfiles.com/ugd/a18aa6_b85d38f8c1fa4427b049b6a4724b0e93.pdf
    • https://static.usrfiles.com/ugd/10e3af_9b338409686d484881d05c37a0d0baa8.pdf
    • https://cdn.shopify.com/s/files/1/0438/7989/1099/files/simple_present_tense_vs_present_continuous_tense_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/kuwiwukofurexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rakapadanixip.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/9105474409.pdf
    • https://static.usrfiles.com/ugd/b91566_b07d910a79864c0da32978c2d8c41c26.pdf
    • https://static.usrfiles.com/ugd/067ecb_ad9d9718555d4eb7afeba181fa2b1e11.pdf
    • https://static.usrfiles.com/ugd/9e53d4_0043b0b9715b4dbdadc242671db96a31.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ce5197c9e444e41af22a31f73cc618d.pdf
    • https://static.usrfiles.com/ugd/ab63e3_cf53ff18abe248e1bcfdefb1057a3e9e.pdf
    • https://static.usrfiles.com/ugd/4b68be_da3c0a1667404a8c861c97b293a99d6f.pdf
    • https://static.usrfiles.com/ugd/0bcf16_434aa339c7354831b176d2c53a5a780d.pdf
    • https://static.usrfiles.com/ugd/ac72e0_302335aa15f04da7b0f8d80d735c1e17.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_off00005c8e.bin
0f309108d27eff0ac78b113ff495e571a028217ca26aec04ecf62150cccee871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8E 5028 bytes
font_01_sfnt_off00006db2.bin
6e486bdff858a8d6de23b2e69b8170688aa9548c0ea30370224c00fd1ff8a77c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB2 9884 bytes
font_02_sfnt_off00008f84.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F84 4324 bytes

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