Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae2f5fd55a5b25e…

MALICIOUS

PDF

57.9 KB Created: 2020-08-08 23:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 451321bba98db8fd5b24a8e0280700af SHA-1: d29fce7783815b18a1c88199cf7f0a62b67583b0 SHA-256: 4ae2f5fd55a5b25e8b588776994e643774e8b0dcaf9cadcb7e278f953e0c4c77
128 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains fragments of text and URLs that align with the heuristic findings. The presence of a malicious redirector suggests the intent is to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=action+research+arm+test+arat+pdf
    • http://nitasunux.sweetsituation.com/uploads/1/3/0/8/130814017/71799.pdf
    • http://files.kalanimassage.com/uploads/1/3/0/8/130813054/9627874.pdf
    • http://files.coronavirusreportcard.ca/uploads/1/3/1/6/131606169/5402135a593b19d.pdf
    • http://files.rossetticonsultingsas.com/uploads/1/3/0/7/130775257/vobapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4685/5078/files/bebaxotusijo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/56980183017.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/35617159702.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/chuyn_sang_file_nh_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/46883145852.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/94188999982.pdf
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/45820734490.pdf
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/lerasidoxusepa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/mujidin.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/vaneve.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/40748595749.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/latex_to_png.pdf
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/fake_pay_stub_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/86868866952.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_off000096b7.bin
328beb2777bbce1b0cb93cbc3a6a3297cab7ddc6f0398ce412bf6687df2207ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x96B7 5352 bytes
font_01_sfnt_off0000a8c5.bin
4736823613eceaf45548eb8e0298c6fe9f2978cd504b3b4f1646f755f806b08e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C5 15888 bytes