Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e1fed460a9bd89…

MALICIOUS

PDF

44.7 KB Created: 2020-08-06 12:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 829ec00e544ff64e4ec2ee4a10c41adb SHA-1: 464878f8b711385c92863c0297c1caae82b7b9ce SHA-256: d6e1fed460a9bd891d70fc826a730a52b962a5322cdc129d6f8ddaf0f5f560f9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wb?keyword=reduce%20pdf%20file%20size%20adobe%20acrobat%20pro%20dc', is designed to lure users by promising a PDF size reduction tool. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com. No scripts were extracted, but the primary malicious intent appears to be redirection to potentially harmful 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/wb?keyword=reduce%20pdf%20file%20size%20adobe%20acrobat%20pro%20dc
    • http://files.travelertanner.com/uploads/1/3/2/6/132680808/xanoraguxuvewi.pdf
    • http://files.newfiremusic.com/uploads/1/3/1/4/131454024/e3deb9.pdf
    • http://files.santoslawoffice.net/uploads/1/3/1/6/131606094/6210229.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/51859499016.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/lodash_remove_duplicates.pdf
    • https://cdn.shopify.com/s/files/1/0441/2915/7272/files/organic_chemistry_acids_and_bases.pdf
    • https://cdn.shopify.com/s/files/1/0435/2838/8772/files/genesevaror.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/losodakuravusenabuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/96293253608.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/76483828080.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1571/files/78534917928.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/bevuzuma.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5694/files/57802804696.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/45317255872.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/fatazidif.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/nuferara.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_off0000719b.bin
1ad09378d7911fbff59094776c123c92e10128ea80d42df044437d9e55d1e67e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719B 5348 bytes
font_01_sfnt_off000083e2.bin
8281f16a97eaceffbc45e4b6e2e8081b7dc318783748a19e87b1e050de0bd8f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 9920 bytes

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