Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3400d20ec066a4…

MALICIOUS

PDF

48.3 KB Created: 2020-08-06 09:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45fa56f6033bd93b0f8cce2b107b6956 SHA-1: d250ff81a20afeafc5d5938d43f18ec066750fe4 SHA-256: 3a3400d20ec066a46f7e15341bd6cb30769edd8b064fa4c8d073a7d888b3649b
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=today%20dinathanthi%20newspaper%20pdf%20download'. The document body also contains this URL and a list of other URLs, many hosted on cdn.shopify.com, presented as download links. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the lure mechanism. No scripts were extracted from this sample.

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.cc/wb?keyword=today%20dinathanthi%20newspaper%20pdf%20download
    • http://files.mexitem.com/uploads/1/3/2/7/132710678/6740723.pdf
    • http://files.landzmanagement.com/uploads/1/3/1/3/131379828/janez_tuwokokerixav_dipoka.pdf
    • http://buwimupol.jusrydetrackclub.com/uploads/1/3/1/4/131408027/fapilenijaza-dulaj.pdf
    • http://files.integratedenterprisesoftware.com/uploads/1/3/0/7/130776639/6892536.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/58055245251.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/41010905300.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/37556996173.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/d3_pin_node_double_click.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/kokupubusilevetepamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/80836251136.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/wedomitalexa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3241/0272/files/how_to_untrack_files_in_git.pdf
    • https://cdn.shopify.com/s/files/1/0428/3750/8252/files/zizuradovililasowagog.pdf
    • https://cdn.shopify.com/s/files/1/0437/4947/4453/files/most_common_chinese_characters.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005de6.bin
6aab71322584077289e3e95d401bd9a052fafa78e67d95c03612a1dabaa21522
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5DE6 16212 bytes
font_00_sfnt_off00004ca8.bin
10aabfa069703d5721f8aa6bfb73068156dd7390042d61b3b9f49e975097238a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA8 5060 bytes
font_02_sfnt_off0000848d.bin
c1d921fafdbd424bc50d17fa40cb8b19658d9402ec485d5c7758056e39c1ee56
pdf-font-stream PDF embedded font (sfnt) at offset 0x848D 9728 bytes
font_03_sfnt_off0000a5bd.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BD 4324 bytes