Malicious PDF — malware analysis report

Static analysis result for SHA-256 78588c4189f2e85d…

MALICIOUS

PDF

53.2 KB Created: 2020-08-15 14:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98f65a16efbec53a60ba1ad0119b6cc9 SHA-1: 18368026af325919d4a141dcb9fb3dd85271dfe9 SHA-256: 78588c4189f2e85db590f46dc44ede9e635cbc5c3b9857396a18fa225414129e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation attempt to distribute 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=how+does+botryoidal+hematite+form
    • http://files.latoyaharrisministries.com/uploads/1/3/0/7/130739731/c07c6e8a41.pdf
    • http://wazanep.evansvilleultimate.com/uploads/1/3/1/6/131636744/540799.pdf
    • http://xegirikom.lorgemusicarts.com/uploads/1/3/2/7/132712109/naxopo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/71784076502.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/kebijunumeroxogepola.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/wijedofikagufawut.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/mupobotatijamegafore.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/63145838062.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/lipedazis.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/mexigorema.pdf
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/erwin_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0583/files/58430927347.pdf
    • https://cdn.shopify.com/s/files/1/0452/5201/8337/files/belajar_photoshop_lengkap.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/dobebizovodebujiru.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_off00008db4.bin
564a5c1b31639dbd50c5d4e221c893c78ea82db5c01f06fc24faf4418bd9efaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB4 5440 bytes
font_01_sfnt_off0000a021.bin
8a4ccc6e56d68649d5e92819d8ce9f49a7c1bcd6be62c098b18dfd95f1fdfc24
pdf-font-stream PDF embedded font (sfnt) at offset 0xA021 11312 bytes