Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8b58456b6f2d31…

MALICIOUS

PDF

130.0 KB Created: 2020-08-06 04:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 508f6d51b7585216fd1c3222a97b9cdd SHA-1: 8dc31ed3cdc00eaf27599d5cfc92effe81e7fa59 SHA-256: 4c8b58456b6f2d3158eecbb306382357f3299f3ce2e7b2b7dd139caaeee8b1d3
148 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a primary malicious redirector URL identified. The document body, though heavily obfuscated, contains a reference to the malicious URL. The presence of urgency and callback lures suggests a phishing or scam attempt. The primary malicious IOC is the ttraff.cc redirector, which likely leads to a further stage of the attack.

Heuristics 5

  • 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
  • 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=probability+and+statistics+for+data+science+matloff+pdf
    • http://files.tenstringedlyre.com/uploads/1/3/1/4/131406717/fcd62e2f03f1f76.pdf
    • http://files.chasebutlerblog.com/uploads/1/3/1/4/131407469/1493004b.pdf
    • http://files.emilysasia.com/uploads/1/3/1/4/131454286/zoxunutakava.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/43439816437.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/84637323527.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0432/4045/6360/files/94905752364.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/partial_differentiation_chain_rule.pdf
    • https://cdn.shopify.com/s/files/1/0432/8410/3332/files/543885728.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/notebook_paper_wide_ruled.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/sidiliwoboberonipivusutuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/rixaxedofudawiwepevixo.pdf
    • https://cdn.shopify.com/s/files/1/0446/3670/0835/files/couper_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/72184543948.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_off00019fb8.bin
30716cac4ad6f7d8af5266cba8cc3c1b6a7f85f91497b393e46c6f4c199a83f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x19FB8 5544 bytes
font_01_sfnt_off0001b27f.bin
fc839c7be78ae0f8e52545f3fbd1bd0bf5662edca30d145de1574c212b4c3f02
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B27F 15160 bytes
font_02_sfnt_off0001e2d8.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2D8 16164 bytes