Malicious PDF — malware analysis report

Static analysis result for SHA-256 74671697ed2ed67f…

MALICIOUS

PDF

54.2 KB Created: 2020-08-28 06:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f59f050f26b53d21ff01b25eeafb5d8b SHA-1: f4d08e4f15d14561db42ae517927c0a377c377c2 SHA-256: 74671697ed2ed67fe7685bf98c0ab42b41435dd07a3883558c42a8324b59883c
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, ttraff.cc, which is disguised as a driver download. The document body also contains numerous links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL is a high-confidence indicator of malicious intent.

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=symbol+barcode+scanner+ls4278+driver
    • http://files.offthebeamwoodworking.com/uploads/1/3/2/7/132741334/bukemotub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/worusufugetatutewakifat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/60212812127.pdf
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/atomic_habits_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/bimetivos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/poditazijopadepovotil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/94907494623.pdf
    • https://cdn.shopify.com/s/files/1/0433/6946/3959/files/3430029632.pdf
    • https://cdn.shopify.com/s/files/1/0462/1867/4330/files/diabetes_in_pregnancy_guidelines_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0449/8269/8142/files/amazon_delete_saved_for_later.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/24741510547.pdf
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/subsetting_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/dujus.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d75.bin
04256c72b18db428e3237a5c5d4a78b681afc3b538d6c188d8d0d02bc21decea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D75 5692 bytes
font_01_sfnt_off000080b6.bin
127009b6737eedda908f86f5c7d33b86381fdc641eaaa51b1ce49dee13db0561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B6 10976 bytes
font_02_sfnt_off0000a66c.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA66C 16092 bytes
font_03_sfnt_off0000bb34.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB34 4324 bytes

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