Malicious PDF — malware analysis report

Static analysis result for SHA-256 38348240a369a465…

MALICIOUS

PDF

42.5 KB Created: 2020-08-14 12:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723d010b9ff26b94244bddd000ad1442 SHA-1: f4a0bc1ea3e29f23fb7557b96a013189be42d5b7 SHA-256: 38348240a369a465e82020cf67f647bcba0336eaf754bbcc96e0ab6ef887f6ea
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=mejor+aplicacion+ajedrez+online+android'. The document body, though heavily obfuscated, contains this same URL and other URLs pointing to a PDF link farm hosted on Shopify. The primary intent appears to be directing users to the malicious redirector, likely as part of a phishing or scam campaign.

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=mejor+aplicacion+ajedrez+online+android
    • http://files.frcteam2881.com/uploads/1/3/1/8/131856046/a096532621e31.pdf
    • http://files.thesewordsablog.com/uploads/1/3/2/6/132682640/7759515.pdf
    • http://mowonej.cindysearles.com/uploads/1/3/1/3/131380999/ee4ebc4.pdf
    • http://wafuvebuf.boyntonedits.com/uploads/1/3/1/4/131453060/634648.pdf
    • http://files.friendsofcarrollpark.org/uploads/1/3/0/9/130969489/317871.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/9276271384.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/get_json_from_url_python.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/26343034943.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/duvavogev.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1543/files/subukukevesibawevatefusu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/72391430890.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/cambridge_dictionary_of_american_english_for_speakers_of_portuguese.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/lurikodikovokika.pdf
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/microservices_architecture_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/wovupuleruwogosed.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/86120549627.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/65198329273.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/dojipemorov.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_off00006788.bin
62fe9a6476dfd6b8e3cbedebf253c107d6b9e656ab424dab34e8004103146eea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6788 5020 bytes
font_01_sfnt_off000078ba.bin
befac3463a01ec0f47106fce6d7abe6d920c5a3a30c6e2c002688b4a90c9f951
pdf-font-stream PDF embedded font (sfnt) at offset 0x78BA 10460 bytes