Malicious PDF — malware analysis report

Static analysis result for SHA-256 226ddc1c87d7738f…

MALICIOUS

PDF

73.9 KB Created: 2020-08-08 01:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 759cf1a950aec239348e133d6c4a3d41 SHA-1: 53d84e8b10f1708a4a4c2ac9c8d1279ea051d5cc SHA-256: 226ddc1c87d7738f51bec9d43b16f60d04c56423ccc0c040434f3230551a5204
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'April fools day book pdf' and a URL that aligns with the malicious redirector heuristic. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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.ru/pify?keyword=april+fools+day+book+pdf
    • http://files.cpuandmore.com/uploads/1/3/1/3/131380158/tusilasakexam_pabiz_dokafeten_kudiziw.pdf
    • http://fugoso.ubchrmc.com/uploads/1/3/1/4/131406592/dudikedijaves-fivubimodux.pdf
    • http://files.womenscenterbc.org/uploads/1/3/1/3/131381712/6134240.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/zakuxakulomadoxivufuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/9529046421.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/likibipebakaxirixukevizoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/15598178794.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/60280075500.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/nunifizukebudoniwoxuziri.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/fonezixevazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/miloganukixeroxataneg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/luwup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogudanivivakow.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_off0000dab5.bin
a446354d4b144190af16f6267eb5aa81bdc604b9212ed7a40eb853860398797c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB5 5332 bytes
font_01_sfnt_off0000ecee.bin
0a628b8f5c492a06334cf3e7fad8ae881eee084f3d9881319d3f8236978b4adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 14604 bytes

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