Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95e00f3112de973…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 18:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b53bcd4d28cb1a266e0ee55edbbe916e SHA-1: 65c45ef9310bf2128a10808c553bfe5b2da6ec47 SHA-256: b95e00f3112de973c6bd61dc67e9eb709d73517486886c54e2cf05854df345d6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=australian+slang+words+pdf'. Additionally, it exhibits a PDF link farm pattern, with numerous embedded links pointing to various domains, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to disguise the malicious intent with seemingly benign content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=australian+slang+words+pdf
    • http://files.straightoutscribes.com/uploads/1/3/0/7/130739769/rezabafuvaxoza_jakaxo_nawulom.pdf
    • http://files.prettylines.com/uploads/1/3/1/4/131453199/e6ece3eca2.pdf
    • http://files.screvenmotorsports.com/uploads/1/3/1/3/131381237/sugibivigejomeg.pdf
    • http://files.cascadiamotion.com/uploads/1/3/0/8/130813692/tixukujirokupaj.pdf
    • http://files.marysessentials.com/uploads/1/3/1/6/131606526/1147981.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3764/files/history_alive_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/zamunabiguniwuvenas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/82318361112.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/25139844243.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/68267745509.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/piganikaxuxomixitovowoxiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/tegofi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2518/5442/files/setixa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/18861865766.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/gexibajowinapovuluw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0431/8874/8452/files/413762235.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_off0000692f.bin
6eb8f7411a8b416462f059cbe7e2426c3534b979152537d3a432b518842c5632
pdf-font-stream PDF embedded font (sfnt) at offset 0x692F 5288 bytes
font_01_sfnt_off00007b4f.bin
239bb09f82801e6b5ce821b16882a8fac8d84c4bcfe26e822813ef0780cc3a76
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4F 9692 bytes