Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff6e9adadfec1c8…

MALICIOUS

PDF

45.8 KB Created: 2020-08-30 04:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1e51cf108e249da6e89282204a441c6 SHA-1: e1582c7da935e7bf35d7a5c531b2973ae1ba96f7 SHA-256: 0ff6e9adadfec1c8fcabdc57f096829a671c4da1181adf9f8f0a29b12fbc2e75
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=market+maker+signals+777'. Additionally, the PDF exhibits characteristics of a link farm, containing numerous external links, many of which are benign but serve to obscure the malicious one. The presence of a 'download button' lure further supports the malicious intent. While no scripts were extracted, the overall structure and the malicious URL strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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=market+maker+signals+777
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/299074_a6845f05e7b34cb0b4f4f7bff621400f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1120cf36c456447ea4535e950cd98174.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8e11d79b0914f149928f474c9b4c23e.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_e20f45689b12437897a6480d8b75f1a7.pdf
    • https://static.usrfiles.com/ugd/7603ae_9dab8383253145758fb6d41f7812b75b.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/suvogusonawode.pdf
    • https://cdn.shopify.com/s/files/1/0428/0808/2598/files/54852458281.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/xopisix.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/reliability_calculation_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/45939035164.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/ditunefibapidawumedatabep.pdf
    • https://cdn.shopify.com/s/files/1/0440/8875/4328/files/dixujov.pdf
    • https://static.usrfiles.com/ugd/cf14a4_bb11bc18c7e84ef2b39beeabe34bce77.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2bea7a2424b4e5a95fd7814cc3b2ccd.pdf
    • https://static.usrfiles.com/ugd/50c35f_64f8d2430aae480d9f2b1ece2d8d5637.pdf
    • https://static.usrfiles.com/ugd/5926b4_d4eea46a7b65434c9cac3689789c9ac5.pdf
    • https://static.usrfiles.com/ugd/b8c837_02ba7b4d068d483d8c06c1bad8180e89.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b0.bin
73d5c1513f0949d3a10f4e9c91316dc2ab065a410e6035058e82c664dca042d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B0 4832 bytes
font_01_sfnt_off00007602.bin
123b66a26cc066df90b761bc5684be03dc4f5dde7f4e844831c95da2c85d6269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7602 11152 bytes
font_02_sfnt_off00009c1c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1C 4324 bytes

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