Malicious PDF — malware analysis report

Static analysis result for SHA-256 476be6d3447852a8…

MALICIOUS

PDF

37.9 KB Created: 2020-08-19 16:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78b834fe579e160626f5abb8cdd9e65b SHA-1: 2182d1737921d09343418348ad25fa1407785639 SHA-256: 476be6d3447852a88dd44fd6ef4bbff12072d9303025cf77f933f0e824c7d2c4
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to a malicious URL, suggesting a phishing or scam attempt. The document body, though partially corrupted, contains text related to 'Office 2019 professional plus size' and 'wkhtmltopdf', indicating a lure for software piracy or a fake offer. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

Heuristics 3

  • 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.
  • 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=office+2019+professional+plus++size
    • http://files.atenaarquiteturanatural.com/uploads/1/3/1/6/131606011/4668079.pdf
    • http://files.herndonwomansclub.org/uploads/1/3/2/6/132696155/suloxadaxoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/muritosuwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/bolozefatekojadesulap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/principle_of_mathematical_induction_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/9785/7954/files/obmms_ts_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5267/files/19186403449.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/bedatavetejavigarix.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/fomapolaludisu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/sort_values_pandas.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_off0000534c.bin
80494c6fa1e857e847f1360b47106c1efd6a14641b388688bc8f94d737d7a02c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534C 5568 bytes
font_01_sfnt_off00006657.bin
d5e40c48212f473b73af231566034f3ce9c043845eb32ea8f278ced79db9756f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6657 11196 bytes

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