Malicious PDF — malware analysis report

Static analysis result for SHA-256 d221954c1d329c30…

MALICIOUS

PDF

45.7 KB Created: 2020-08-23 06:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6a17a4ad398965b6780a3fda768d331 SHA-1: 5c391d5a75481d66c118e8dfa0b2f277512cd5c5 SHA-256: d221954c1d329c3060d760fda856d134dc471e38a870a8410bc82ed4b0de90ad
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=map+of+asia+with+capitals', suggesting a lure related to maps. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=map+of+asia+with+capitals'. The ML classifier strongly indicated maliciousness.

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=map+of+asia+with+capitals
    • http://files.corydonmissionarybaptistchurch.com/uploads/1/3/1/3/131379040/ximog_vowekolun_vefiwobufid_nefej.pdf
    • http://lolemuz.south7thscience.com/uploads/1/3/1/4/131437379/15752.pdf
    • http://files.maxxxwar.com/uploads/1/3/1/0/131070872/merufogedo.pdf
    • http://files.redcardinalcalling.com/uploads/1/3/1/4/131406841/3892088.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/ridopetowovokulufazomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/jutexixaxafejaxepiven.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/xuxuveri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/40903722510.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/bazizufipuvigomofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/buzinovonivigog.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/aterosklerosis_dan_arteriosklerosis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/74568326210.pdf
    • https://cdn.shopify.com/s/files/1/0437/0635/1771/files/bisuvujonelud.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_off0000691a.bin
7197ce0c1c6adf2e26203abe604ebc5080587aa560e55bf1f0f9ef339c86a70c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691A 3196 bytes
font_01_sfnt_off00007492.bin
4879c6f6f3390b5ff7cb43a2356e4dc346cb1bdf89d84002271454400eb56f8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7492 5104 bytes
font_02_sfnt_off00008604.bin
ed304709a1829693d1f92e1f28529981c76a8e8a902827400d71f2a7db67eb2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8604 10436 bytes

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