Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ef83145063ee53…

MALICIOUS

PDF

77.6 KB Created: 2020-08-03 03:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e757a2ab4d8ba025cf6993cb9ee1fc9d SHA-1: 8aaf029a6ad977196e9245ca2eb378e8a6b311e9 SHA-256: 01ef83145063ee53c8fc8d29ed1ca877369217757abfb1a0e91086ad7111ff9d
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.ru/pify?keyword=mco+1020.+34+g' is identified as a known malicious redirector. The document body contains obfuscated text and a reference to this URL, suggesting it's designed to lure users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/pify?keyword=mco+1020.+34+g
    • http://files.ourplacestoremember.com/uploads/1/3/2/6/132681150/c5a5bee0.pdf
    • http://files.werbegemeinschaft-dinslaken.de/uploads/1/3/0/7/130775245/rasamigavawipa-wiwuwisajawifi-wibagu-xupeduwame.pdf
    • http://files.tracytruesdale.org/uploads/1/3/1/8/131872178/f8b1156a9d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/3026583225.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/kejik.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/2905850843.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/xomurawov.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/mejoxobafalotisake.pdf
    • https://cdn.shopify.com/s/files/1/0438/0216/5410/files/damexasitam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9681/7312/files/89021824470.pdf
    • https://cdn.shopify.com/s/files/1/0440/6666/8694/files/17330070538.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0826/files/linear_circuits_decarlo_3rd_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/tiligerugukok.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/pigiterevimazagawalazaluv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdf
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/sowupek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/free_iso_burner.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e591.bin
99016524519a612bade7ae3278d23f96eadaecfe167efc28692551701d7689be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 5068 bytes
font_01_sfnt_off0000f710.bin
a6d852b3c3e9ccfae44653a2955ad80e654bca2b01be60d232c1436a10ba95d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF710 16364 bytes

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