Malicious PDF — malware analysis report

Static analysis result for SHA-256 28707d1a753528c7…

MALICIOUS

PDF

44.3 KB Created: 2020-08-15 01:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee51c71b9a54814ea10cacf8fa26b9a7 SHA-1: 8e9362cceb06073fbb7bb839e0f1c3dd3d834469 SHA-256: 28707d1a753528c71001d31e8bd097ed33ff678bca578758e527d6fb299ecc23
142 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ihss+electronic+timesheet+san+bernardino+county'. This indicates the document is designed to lead the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a broad distribution or SEO poisoning attempt. The presence of a callback phishing lure further supports the malicious intent.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=ihss+electronic+timesheet+san+bernardino+county
    • http://files.inspirationastudio.com/uploads/1/3/1/0/131070604/solotepugowazi-mosamif-wedomur-gamazotapa.pdf
    • http://files.lighthousepointplymouth.com/uploads/1/3/0/7/130776826/11eec9ec762b57.pdf
    • http://files.bodycreationpersonaltraining.net/uploads/1/3/1/0/131070702/genesodepifud-balegi.pdf
    • http://files.yoghana.org/uploads/1/3/0/7/130776363/925604.pdf
    • http://files.352coaching.com/uploads/1/3/1/3/131383544/julotide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/sanizosapow.pdf
    • https://cdn.shopify.com/s/files/1/0440/7050/2550/files/bajukolovipore.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/47783299797.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/redfish_fishing_report_venice_la.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/71138499556.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/juwogalizek.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/51541801331.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/posefi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1511/6696/files/bioremediation_files.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_off0000612e.bin
e2a9fe410df448a15eb4d0ad80d2e3fbdd4d9e98d498409fea30d6d8c9cad714
pdf-font-stream PDF embedded font (sfnt) at offset 0x612E 5240 bytes
font_01_sfnt_off000072bc.bin
52997be7387ab82d90114c0cc57ccfc80a0cae53072c781fbfb7670aa895b674
pdf-font-stream PDF embedded font (sfnt) at offset 0x72BC 10244 bytes
font_02_sfnt_off000095ba.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x95BA 4324 bytes