Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4e749ebc139984…

MALICIOUS

PDF

55.5 KB Created: 2020-07-20 21:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 927be121d9c32130716cfe8058a612b1 SHA-1: 5afbdbbc7e3d427be8b51219e26051f621fba5c8 SHA-256: 4a4e749ebc139984f4d94163461447fb361d30512c6a1dd2acdd8db0d7333794
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that are part of a link farm, designed to appear as legitimate download sources. One critical heuristic firing indicates a PDF redirector link to 'ttraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'e magazine free download pdf', reinforcing the lure. The primary attack vector is a user being tricked into clicking the malicious link, leading to potential further compromise.

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.ru/wb?keyword=e%20magazine%20free%20download%20pdf
    • http://files.loistivey.com/uploads/1/3/1/3/131398430/dunobixifexibuvuxege.pdf
    • http://files.hammondminiatures.com/uploads/1/3/1/3/131382078/a2ad6c23f.pdf
    • http://files.miriamruberlartist.com/uploads/1/3/1/4/131483019/828517e6fc26dc2.pdf
    • http://files.lambfarmdesigns.com/uploads/1/3/1/8/131871992/woxowidanusuw.pdf
    • http://files.lambfarmdesigns.com/uploads/1/3/1/8/131871992/woxowida
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/81754422399.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/subalewopoxunamenukomuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/3993173123.pdf
    • https://muwafinatub.files.wordpress.com/2020/06/79746899454.pdf
    • https://kemelis.files.wordpress.com/2020/06/sotosebe.pdf
    • https://niwewex.files.wordpress.com/2020/06/dafuvova.pdf
    • https://gozuwexoje.files.wordpress.com/2020/06/nizubapisobekesaralomix.pdf
    • https://legamigi.files.wordpress.com/2020/07/39535701925.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/84478318978.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/fuxulebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/72360742091.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/majiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/9740893231.pdf
    • https://cdn.shopify.com/s/files/1/0433/4803/3689/files/85281558173.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3806/files/11885086339.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/sataxituwidapovarif.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_off00009c34.bin
e117a89698c8d6c30887b9431ad0fc867300cea9ed485ba0309b07e95d143c72
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C34 4988 bytes
font_01_sfnt_off0000ad21.bin
b2a0e757d8075c1378d044479a80be76299f004ad89e76de8b09c9723afb53f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD21 10488 bytes