Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ac41e8683d35b3…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 13:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6306ebaadde38f7ed75a10871287d908 SHA-1: 6a14916e0af0e4e774cba914c4876dfa9e0f6059 SHA-256: 20ac41e8683d35b3364322ddc1505e1f33ac0c721335af7fb890f71c9b2f2cee
128 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links, with one critical heuristic identifying a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=easybib.+com+s+pdf+apa+citation+generator, which is likely used to lure victims to a phishing or scam page. The document body itself is heavily obfuscated and contains references to the redirector URL and numerous benign-looking Shopify links, suggesting a link farm or SEO poisoning tactic to mask 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=easybib.+com+s+pdf+apa+citation+generator
    • http://files.soapbarlounge.com/uploads/1/3/0/7/130776718/luriza_bokitewakikizu_sepipe.pdf
    • http://sixuseti.staffordcounty.org/uploads/1/3/1/6/131637136/720294ffc549.pdf
    • http://puwopiga.eielsonchurchofchrist.com/uploads/1/3/1/3/131383483/5639936.pdf
    • http://files.adobeforfashion.net/uploads/1/3/1/6/131637148/1980349.pdf
    • http://files.annamae22pngstock.com/uploads/1/3/1/4/131438113/e6947cd.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/gumujagaxaberifekeluveb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/zudidorurokodivowe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/60386361174.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/vivuduxurejanolexovubun.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/mama_family_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51268900441.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/54194223529.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/mrityunjay_kadambari_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/salusonikedadunofagaja.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7495/files/punch_home_design.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/64394836768.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/wawegekipo.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_off00006023.bin
39dcee49f6842877f3c4a9a34b2907c6450e7b62ecc13940f44935377f06399b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 5676 bytes
font_01_sfnt_off00007372.bin
36747401407d9211e59a7a66e4e92319b560bf8527e850980f61edacaf9a5cd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7372 9692 bytes