Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ac6c5f52541bc3…

MALICIOUS

PDF

50.2 KB Created: 2020-08-11 21:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ecc81bbe722cdfe6be37e206955aac3 SHA-1: 08b25d27f8f150956cefb012d8ef191db8c4430b SHA-256: e4ac6c5f52541bc3c12b6949c0c318520fd4c4062459a2ac248ab6029ba110e0
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://ttraff.cc/pify?keyword=el+submarino+lothar+gunther+buchheim+pdf', is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains this URL and other links that appear to be part of a link farm, suggesting a social engineering attempt to drive traffic to malicious content.

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=el+submarino+lothar+gunther+buchheim+pdf
    • http://files.greenteamllc.com/uploads/1/3/1/8/131857305/rixipomavuzadegabur.pdf
    • http://files.collegeroyalsociety.com/uploads/1/3/1/4/131406717/murapigawukiv.pdf
    • http://files.sidritwanders.com/uploads/1/3/0/7/130776200/mugitesojunajaf.pdf
    • http://files.elementsbookscoffeebeer.com/uploads/1/3/2/6/132695576/zisajojofevowepesuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/61679720847.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/adobe_acrobat_editing_software.pdf
    • https://cdn.shopify.com/s/files/1/0436/8770/6777/files/bronchiolite_definition.pdf
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/lirifepavodes.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/78408601913.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/czasy_teraniejsze_jzyk_angielski.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/68406368156.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/sygg_river_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/synonyms_words_in_english_a_to_z.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/asfixia_perinatal_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lapifobojupe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/61412396715.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_off000076e4.bin
cebd2f1108f574b76903b2a4abafef302df1906b500ae9dbd1441ca1476223aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 5548 bytes
font_01_sfnt_off00008985.bin
7590a22bc464909d1b225e84b93fbfbeed763c5f199dd8e6836295fe17a236bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8985 10460 bytes
font_02_sfnt_off0000ad1e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1E 4324 bytes