Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab234d56101076d…

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 06:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce1b5c00736f6931c8d95ff7cda785fd SHA-1: e6916b8979cf59e6f2d840bbeb0e1faf46c74523 SHA-256: 8ab234d56101076da5d7d7115a25b9ac715af581d9ca016712e866383788e528
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to potentially malicious redirectors, disguised as a forestry report. The primary malicious URL identified is https://ttraff.cc/pify?keyword=john+clegg+forestry+report, which is likely used to redirect users to further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=john+clegg+forestry+report
    • http://vasetaz.carriebeleno.com/uploads/1/3/0/7/130775291/lurexobimuxor_zarujadamivipu.pdf
    • http://files.trainlikeaprodc.com/uploads/1/3/1/4/131482916/c8643c1e.pdf
    • http://xavosux.ayurvedabarcelona.eu/uploads/1/3/0/7/130776031/sebedivanol_xumexutalo_didepesivuwuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/50304006325.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/ganapati_atharvashirsha.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/beauty_s_release_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/cancer_de_estomago_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/manopokobogurifupixuja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/synonyms_and_antonyms_for_cds.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/29332212161.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/11506088891.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/54078307867.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24810932871.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/widizaxokumilajuvolim.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_off000061c0.bin
20548f3f9a059e4bdfdf216d9f7d6373d60b6ab34ca16fa81ca4f959e25c114e
pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 5156 bytes
font_01_sfnt_off00007356.bin
6ffe5ba486898d96890bf1e1c97cce55062e792a1c9152c1bbd6fa58f3315f96
pdf-font-stream PDF embedded font (sfnt) at offset 0x7356 10316 bytes