Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f37df0ab162888f…

MALICIOUS

PDF

45.4 KB Created: 2020-08-10 21:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e622a222c7a0b66d4e3e368ac2f3505 SHA-1: cad253e46b5e3716b4b91c3b18d83678f15783a2 SHA-256: 6f37df0ab162888fd365d97e6836d9c5b8b9abd3b1cffa440f349042ed5811e8
154 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially obfuscated, contains the URL 'https://ttraff.com/pify?keyword=difference+between+auditing+and+investigation+pdf', suggesting a phishing or scam attempt. The presence of numerous external PDF links also points to link farm activity, likely for SEO manipulation or 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.com/pify?keyword=difference+between+auditing+and+investigation+pdf
    • http://files.cassandralaurion.com/uploads/1/3/0/8/130814043/tejixetokevanu.pdf
    • http://files.filipaguimaraes.net/uploads/1/3/1/4/131407552/6b4e48f23443e6.pdf
    • http://files.ondrashturek.com/uploads/1/3/1/6/131636914/27df6.pdf
    • http://files.thebigbarmitzvah.com/uploads/1/3/1/3/131380292/0ffe199d.pdf
    • http://files.michaelgreermd.com/uploads/1/3/1/4/131437276/nevuruwizenu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/brche_erweitern_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/76978321523.pdf
    • https://cdn.shopify.com/s/files/1/0451/0393/9749/files/24180553378.pdf
    • https://cdn.shopify.com/s/files/1/0437/8014/5313/files/7590683923.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/fedasinirapuzerijawamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/gifedipatizebinufigiro.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/18070994892.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/zapeferenuze.pdf
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/64258969721.pdf
    • https://cdn.shopify.com/s/files/1/0432/3655/6962/files/25853416076.pdf
    • https://cdn.shopify.com/s/files/1/0434/2448/1431/files/abertura_inglesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/48651100402.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000662a.bin
45a03dd8cbd123bc51d1c6861116698dd296a73cb8a0120860563ede7128de24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662A 5464 bytes
font_01_sfnt_off000078de.bin
7207d331637c2f2a3ab0343d2785e1b373affb6465161c501077cc867f6baf15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DE 9648 bytes
font_02_sfnt_off000099a9.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A9 4324 bytes

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