Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bf03d63b7cdfd9…

MALICIOUS

PDF

47.2 KB Created: 2020-08-14 01:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2095d24eda6a2c24e64425babb14cfb7 SHA-1: a8c2a0186ba2b772a680a13f1ce880d1266d1b54 SHA-256: 54bf03d63b7cdfd9bac6fb95ffbf826b001b3f726e0c30d04e942b0c709e7bc9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO spam campaigns. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wb?keyword=a%20to%20z%20verb%20list%20pdf%20download'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the redirection to malicious sites via these links.

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/wb?keyword=a%20to%20z%20verb%20list%20pdf%20download
    • http://files.finaldraftwriting.com/uploads/1/3/0/7/130775274/gunugofavo-lonugil-fuvopirozosabix-bukozetaw.pdf
    • http://vutopobi.mollydogdesigns.com/uploads/1/3/1/4/131438641/e8215.pdf
    • http://files.havaheartcorgis.com/uploads/1/3/1/4/131407898/suxoxu_mozotulenupol.pdf
    • http://files.vapekingstogo.com/uploads/1/3/1/3/131398547/delan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/favuvogitanoxanifimedazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1029/files/40058329088.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/rozileno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puwojadudabub.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/ledubozonizeserirozemi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/lukufuruvereleda.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/belajar_bahasa_mandarin_untuk_pemula.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/hk_g36_22lr.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/79310844325.pdf
    • https://cdn.shopify.com/s/files/1/0432/0624/6557/files/green_revolution_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/repigiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7415/files/lutusiva.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_off000066df.bin
7b78152024a9eb87c12107bcdec47de62925910cede4d7168429cd69a50b6181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DF 5152 bytes
font_01_sfnt_off00007882.bin
2f9f231bbd48db68e169bd4ace75e2c75afa797765c9d04edac462b7d62e7679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7882 12900 bytes
font_02_sfnt_off0000a1b3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B3 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.