Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09c0f04c058ea56…

MALICIOUS

PDF

39.6 KB Created: 2020-08-20 20:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea35b0e372a6844dc4a36d4571b6d5a2 SHA-1: 0d9b145cd706f52c4eae0b093de298f5a0094cd1 SHA-256: f09c0f04c058ea56ec44e572a318ddac93b149b322704eb00fbd115c68f4b786
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to website templates and includes the malicious URL. This suggests a phishing or social engineering attempt to direct users to malicious infrastructure.

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=free+template++for+website+wordpress
    • http://files.bridgerbirthing.com/uploads/1/3/1/3/131384070/gomobexetopitaxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/12222953850.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/12432936418.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2045/files/barijunodebezurilapifuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/tijikirupafitefolawud.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1032/files/critical_theory_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/zunavuzokonikobux.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/44669091949.pdf
    • https://cdn.shopify.com/s/files/1/0431/0650/0769/files/kuvil.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/fefekuturetasimigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9819/files/96769771442.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_off00005c87.bin
df0b79f3f8f538b88070245e494031c18ebb5819d2b4cd421e593d88326adc49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C87 5376 bytes
font_01_sfnt_off00006ec4.bin
ffc8451aad9f6d0411db43865d7ac1bf2b1d1bf170e0f12fd4fdea65be0b7452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC4 10276 bytes

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