Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78e1ff2b9feeba9…

MALICIOUS

PDF

51.5 KB Created: 2020-07-31 13:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adb1f72ac71bf17d6b14d1c3d9d4f661 SHA-1: 3f1abe7b047de71dd120f52bb54350ae0db87f63 SHA-256: d78e1ff2b9feeba985ece5057b3cd60356b09f87ce373433da67685557b4825b
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure via the URL https://ttraff.cc/pify?keyword=1956+constitution+of+pakistan+in+english+pdf. Additionally, PDF_SEO_LINK_FARM indicates a mass of external PDF links, with the first being https://cdn.shopify.com/s/files/1/0429/5216/3482/files/foxomisidetewagobuju.pdf. The ML classifier also flagged this PDF with high confidence. These factors suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=1956+constitution+of+pakistan+in+english+pdf
    • http://files.magdalenevii.com/uploads/1/3/0/7/130775172/fokelaxadix-dosonazozir-fizare.pdf
    • http://files.francisweller.net/uploads/1/3/1/3/131383959/xuzola.pdf
    • http://files.natashabrussell.com/uploads/1/3/1/4/131411411/mumiwamalazozi.pdf
    • http://files.vernonvtmusic.org/uploads/1/3/1/4/131454272/5245559.pdf
    • http://files.lightsoutbaltimore.org/uploads/1/3/0/7/130775342/tizigulowoloxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/foxomisidetewagobuju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/lorodoginet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/15270339821.pdf
    • https://cdn.shopify.com/s/files/1/0434/0446/0188/files/joworag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13534048661.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8137/files/49964418464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikumakosesik.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/72834799747.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/66975467269.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008abd.bin
cac7342955e30ef7cf0dd9223f723e2c4ad8ff1c78b00cb84ffe549966067dd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABD 5660 bytes
font_01_sfnt_off00009df9.bin
a9180506bfc0dade07323d47b2d37722d16139202c33152cf4d2818ee8c53c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF9 10100 bytes

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