Malicious PDF — malware analysis report

Static analysis result for SHA-256 288348d075974c24…

MALICIOUS

PDF

50.2 KB Created: 2020-07-18 22:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95fedf8c35de8528a117c39b7b8ccd2d SHA-1: 1ba41eae2eef2571f236f5e751697f995ce5e646 SHA-256: 288348d075974c24ea9791a810bcdde8f760538a76a00232a56b0eeef88d5dd2
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to WordPress hosted PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=file+handling+in+c+pdf+free+download'. This indicates an attempt to direct users to malicious content under the guise of providing free downloads.

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=file+handling+in+c+pdf+free+download
    • http://files.stuttgartmath.com/uploads/1/3/1/4/131453365/2335560.pdf
    • http://files.compass-quay.com/uploads/1/3/1/3/131383404/dedibotavosowan_vogamez.pdf
    • http://files.caseyharvilla.com/uploads/1/3/2/7/132712214/vevuzupakaki.pdf
    • http://files.jeninottphotography.com/uploads/1/3/2/7/132710669/148162.pdf
    • http://files.jeninottphotography.com/uploads/
    • https://dakenoxuw.files.wordpress.com/2020/06/62405705466.pdf
    • https://zajenunu.files.wordpress.com/2020/06/91084650801.pdf
    • https://weberex.files.wordpress.com/2020/06/38285789673.pdf
    • https://zufudevuse.files.wordpress.com/2020/06/70830062334.pdf
    • https://gomumutuweno.files.wordpress.com/2020/07/wavonepaxen.pdf
    • https://mudosezu.files.wordpress.com/2020/07/relutobifegejifemo.pdf
    • https://garigubit.files.wordpress.com/2020/06/tefatujuk.pdf
    • https://tibozetus.files.wordpress.com/2020/06/bunawikawug.pdf
    • https://vorituve858525036.files.wordpress.com/2020/06/55993244957.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/tetexabujufogobemag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodupenewizaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/83645589087.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8067/files/sotijogoxezupiroxojuxak.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/defolomojugaxovalipetege.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/gikugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7374/files/51472188248.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.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_off000085e2.bin
6db5fea157ead9fbe07d99b00d8389694c3766ad8d912433e41408d58956f2a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 4992 bytes
font_01_sfnt_off000096d7.bin
64a5a8cf07f4870e8d75ccf9bb90eac5420c444b84b9e126242c2175e7406663
pdf-font-stream PDF embedded font (sfnt) at offset 0x96D7 10688 bytes