Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7bf65dbb52fc74…

MALICIOUS

PDF

51.2 KB Created: 2020-08-05 03:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a39b57addee7b8dac1b76a136f22772 SHA-1: ba750bede3d5d53c59fc9cd0290af27d2fe4385e SHA-256: 9a7bf65dbb52fc749b95e2cf0c95bc73942646c177dc1a734b964b0e0d724142
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify but point to a redirector. The primary malicious link, https://ttraff.com/pify?keyword=biology+textbook+pdf, is identified as a malicious redirector. This suggests a phishing or scam attempt, using a lure of a 'biology textbook pdf' to entice users to click through to malicious infrastructure.

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.com/pify?keyword=biology+textbook+pdf
    • http://janose.squarecatvinylshop.com/uploads/1/3/1/6/131607131/buloweribasiputove.pdf
    • http://files.milantownship.org/uploads/1/3/0/8/130874683/kafug.pdf
    • http://files.yvesalizahno.com/uploads/1/3/1/4/131483830/xemabedelejadapode.pdf
    • http://files.oriolebeachel.com/uploads/1/3/0/9/130969985/najaratiwe-ramafefedudeze-zexepi-kekewaxevaxibe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/deboxebo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/5166355590.pdf
    • https://cdn.shopify.com/s/files/1/0433/4983/5930/files/74074133530.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/algorithm_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/73843740858.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41326774972.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7299/files/5974567766.pdf
    • https://cdn.shopify.com/s/files/1/0440/1060/2661/files/implementing_a_hashtable_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/9443725736.pdf
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/mamorin.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/risk_game_of_thrones_deluxe_regole_italiano.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_off00007b5f.bin
9829d07a670666fc54c27a77e87e5f635b528ceb40d7b3d61109a8feae6bd078
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5F 4832 bytes
font_01_sfnt_off00008be9.bin
661ab08ef368ba48e8eec07c6a593964f24ed5d338bbd347fd8beaa873b7cf11
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE9 11488 bytes
font_02_sfnt_off0000b227.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB227 4324 bytes