Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b6102afe9e4dd6…

MALICIOUS

PDF

128.3 KB Created: 2020-07-24 03:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de8009d2c3c91a858589998e1f13f08d SHA-1: 2cbae569d17369c142265f984c71dff6367a22c6 SHA-256: a4b6102afe9e4dd6dabb2f1f357abcce9c7f52afcb0251dcca0d81bf9ec6d7c2
140 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 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, one of which is a PDF hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Netacad final exam answers', suggesting a lure for credential harvesting or further malicious activity. The presence of a callback lure heuristic further supports a phishing or scam pretext.

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.com/pify?keyword=netacad+final+exam+answers+2016
    • http://files.cohenbrosracing.com.au/uploads/1/3/0/7/130775537/054f2aded4c27.pdf
    • http://files.mrbsfinest.com/uploads/1/3/2/3/132303080/wozesepivijiwox.pdf
    • http://files.lhmspta.com/uploads/1/3/1/0/131070895/7ffb935.pdf
    • http://files.shopnotjustflowers.com/uploads/1/3/1/4/131406274/gamikuxujil-zajesazof-xifemexaditis-xireduwabejile.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/zonexale.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/88622437435.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4330/files/wokavopizaxuneliwog.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/kewejelugesesapoja.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/75341897424.pdf
    • https://cdn.shopify.com/s/files/1/0428/2528/5798/files/45092858049.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/logopazunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/zufabenuxabemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/47366952140.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/8016522726.pdf
    • https://cdn.shopify.com/s/files/1/0435/2580/0087/files/20016546290.pdf
    • https://cdn.shopify.com/s/files/1/0434/5026/9849/files/28724239795.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/54777759191.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_off0001bbae.bin
c7181b61b97b5d03befcb967562c1284bd8d2e787b18878803c4df7184aba947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBAE 5452 bytes
font_01_sfnt_off0001ce35.bin
4bcca3a8879da792a1c901377db1e767c95c979ef8c7238c37c22b85aecbcae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE35 11164 bytes

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