Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ff6a6be03a1452…

MALICIOUS

PDF

52.2 KB Created: 2020-08-17 08:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32a56851b0ac5c21942fb62df0b083f6 SHA-1: c9ebda661c082ab798f4ca6466f4acd1cc30eeef SHA-256: e5ff6a6be03a1452f8d7b03fa8fde0c67665b25510bba772294b158cd2d4078a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Advantages of social media for business pdf' and the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to Shopify domains, likely to improve search engine ranking for the malicious content.

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/pify?keyword=advantages+of+social+media+for+business+pdf
    • http://files.chrispickstock.com/uploads/1/3/0/7/130776828/7780681.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/mufotazobididod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/73014053202.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/71004270711.pdf
    • https://cdn.shopify.com/s/files/1/0441/1287/1576/files/develejatufer.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/73917843168.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0213/files/wifopibiforiwojadonusudaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/71899604766.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/detoperizixuxatuvosovuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/72059172177.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/61869425605.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/60280181845.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/61175049257.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/cover_page_mla.pdf
    • https://cdn.shopify.com/s/files/1/0431/8111/3506/files/realistic_minecraft_mod.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_off00007e49.bin
9c536e8029d635b6e3598a84c31368d4fa7f32061146f59c7c5ea3d18e4968af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 5544 bytes
font_01_sfnt_off0000910e.bin
12534eec010df0385e90f487e7e8a6052b21cc59a94f338dcebfe0c2e77336a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910E 10572 bytes
font_02_sfnt_off0000b533.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB533 4324 bytes

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