Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1de48f077259ac…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 08:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb2a8bea2f16a496208f535ec6c2b69 SHA-1: 93afed9c0758134e4381ac2a3617544262b38de4 SHA-256: 8b1de48f077259ac20f71206761cf6dddedebddcd629eaee30ade1b7b9b787dd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=astable+multivibrator+using+bjt+pdf'. This URL is likely used to lure users into clicking a link that leads to malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The file also contains a large number of embedded links to Shopify, likely for SEO manipulation or to appear legitimate.

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/wix?keyword=astable+multivibrator+using+bjt+pdf
    • https://cdn.shopify.com/s/files/1/0432/4540/4327/files/apc_ar3100_spec_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/3400/7973/files/99077203988.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/35251280798.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/17315089832.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/66693645477.pdf
    • https://cdn.shopify.com/s/files/1/0435/2979/7787/files/bisesebavalezogoveworu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/apa_article_abstract_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/katijudiwidim.pdf
    • https://cdn.shopify.com/s/files/1/0451/0554/5369/files/negative_prefixes_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/mexazilovidevasekoxitexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/sokolizakefowegidexam.pdf
    • https://cdn.shopify.com/s/files/1/0437/7097/0274/files/xujivituraxuwapolunizapew.pdf
    • https://cdn.shopify.com/s/files/1/0437/5245/6346/files/detifigufiwav.pdf
    • https://cdn.shopify.com/s/files/1/0436/3059/2160/files/bunny_rabbit_template.pdf
    • https://static.usrfiles.com/ugd/493135_b9212d1997be438bad5588cfa93d69ad.pdf
    • https://static.usrfiles.com/ugd/97aff7_0cf7e2add0504ad38d55bb96a102fe92.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_off00006065.bin
050c22930ca66b88355c3ae66770e12b29e440bd44752d048c4ff1b9fe6cc699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 5628 bytes
font_01_sfnt_off0000737b.bin
cb2c831d54bf22da8f51732924b00fbc3e5e71da18dbde6a85c891035526e181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737B 12688 bytes

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