Malicious PDF — malware analysis report

Static analysis result for SHA-256 f137c91b2519803d…

MALICIOUS

PDF

44.1 KB Created: 2020-09-09 06:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a904fab162e8774c9c15c4f8998c0c2e SHA-1: 2a98430056e5399564a054f7ac17206b51005091 SHA-256: f137c91b2519803d42263cbee35d9a8ffad84e4afb04b7337722aba925955f62
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains multiple embedded links, including one that redirects to malicious infrastructure. The document body text and heuristics indicate a lure to download an 'apk full' via a link. The primary malicious URL identified is ttraff.me, which is used in conjunction with a keyword search. The PDF also hosts a large number of other PDF files, suggesting a link farm for SEO poisoning.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=passport+photo+maker+apk+full
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/luzapijurifegefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/61998624747.pdf
    • https://cdn.shopify.com/s/files/1/0429/9020/7139/files/nuxuribaralezusogomigoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/feelings_buried_alive_never_die.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/namibedimin.pdf
    • https://static.usrfiles.com/ugd/078c79_a57aaa4f83d241f0bc1305d233db1609.pdf
    • https://static.usrfiles.com/ugd/3fc21f_a31a0f87b8924bbead7c9de488333a3d.pdf
    • https://static.usrfiles.com/ugd/824332_7a7ccaf8d60147ce80da527c742b5676.pdf
    • https://static.usrfiles.com/ugd/286fb8_7e48dae527824d9c82add10b8d90854d.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/76724234557.pdf
    • https://cdn.shopify.com/s/files/1/0463/4499/4973/files/tosipowomogemovarovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/88245430925.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_off00006232.bin
d66c16e78dc7553e42f0d5a50178215c81a916414ed9f8b9ca799c0c1073a191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 4936 bytes
font_01_sfnt_off000072fb.bin
9e1f1c63db47cb6400d4f8e456f3bc84909e7c7acef36afcdad9dc12865e3ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FB 10128 bytes
font_02_sfnt_off000095bf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BF 4324 bytes

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