Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43ea46ae1be3f45…

MALICIOUS

PDF

49.3 KB Created: 2020-08-03 12:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a47f32939eb52c6f880ae1f2f932f7ba SHA-1: 5aafe59230edbbb5c9511ca798e5bd2d53f52b5e SHA-256: e43ea46ae1be3f45fb7cd4e12aad4ebf3f41c30737b223eacc8f5d75babbd363
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link-farming or SEO manipulation tactic to disguise malicious redirection. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bulk+pdf+resize+online', indicating a lure for users seeking PDF resizing tools. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=bulk+pdf+resize+online
    • http://files.sydniessweetlife.com/uploads/1/3/0/7/130740141/97152.pdf
    • http://files.drumcrimewatch.com/uploads/1/3/1/4/131452806/8362254.pdf
    • http://files.calgarysnotary.com/uploads/1/3/1/4/131407080/adb88.pdf
    • http://files.tcjewelers.com/uploads/1/3/1/3/131398504/milopesulij.pdf
    • http://files.ninelivestwine.com/uploads/1/3/0/8/130874629/vezik_gunefitotokek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/dentrix_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/bobcat_of_fresno.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/ferovutetizewinafojet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/40258384187.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/13258982820.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/92278638631.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/tujifejevif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zamujogeve.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/5818178536.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_off00008534.bin
fea6e01bc20d38c40f52e770d39cb0d744e18a9ea3f3b8c725aa9581debcc3b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8534 4988 bytes
font_01_sfnt_off0000964c.bin
160356d3b9777cef64efca442fab041cd90c92e0d133e3025d9bff622c6d8afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964C 10088 bytes

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