Malicious PDF — malware analysis report

Static analysis result for SHA-256 740e210414476aad…

MALICIOUS

PDF

41.5 KB Created: 2020-08-02 17:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d64694384dc9e5379aa5080dca25778 SHA-1: 21c989b7b00fa18a48101713d473f978bb12877c SHA-256: 740e210414476aadbbcc0e3d646e5bca240f6eee0f16d73a0cba2a8fc7330366
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document also exhibits characteristics of a link farm, with numerous embedded links to external PDF files, many hosted on Shopify. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user trust through a deceptive document. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=da+form+1380+pdf
    • http://files.stjamesdevizes.org/uploads/1/3/1/6/131637316/bamokupawinow-pidevosata-ramuzepizesiz.pdf
    • http://files.konstantinvalchev.com/uploads/1/3/1/3/131384145/pejomaxodaxejin.pdf
    • http://files.andyknappmusic.com/uploads/1/3/0/9/130969954/basuk_fidajuxe_najabalidigexe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/96523843013.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/14514867915.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/630393575.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/gazajifonotozig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/14268592719.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/vamenaximuwoxowotubapev.pdf
    • https://cdn.shopify.com/s/files/1/0436/3934/1216/files/kms_client_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/18436922937.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/514908197.pdf
    • https://cdn.shopify.com/s/files/1/0447/1826/0377/files/e5_92_b8_e9_b1_bc.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/15600705383.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/78928113856.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/77289675784.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_off000063d3.bin
d3d22ea42197b1affe3bb770735f17de1f3ea37ebfeb24183afed911261274f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 5528 bytes
font_01_sfnt_off00007699.bin
384ece0bfd7ea135099bcabe5f00ba00fa610d1ca67db4ee9a42b1fd735bc3c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7699 10184 bytes

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