Malicious PDF — malware analysis report

Static analysis result for SHA-256 111d1e686a3a7726…

MALICIOUS

PDF

53.3 KB Created: 2020-07-29 21:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0651e99d5f3f4bc48ae3f00ce463e15f SHA-1: 18be82cbf5674f1aab89404c5f2a913010c41021 SHA-256: 111d1e686a3a77261ca4dfc813b06ba229fe832773b558f92df77125b5b1fa58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to PDF editing tools. The presence of a large number of external links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to distribute malicious content.

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.com/pify?keyword=add+text+to+pdf+acrobat+reader+dc
    • http://files.joyfulnoisepreschoolsandy.com/uploads/1/3/0/8/130813768/595cf7d.pdf
    • http://files.trainshoppeslc.com/uploads/1/3/2/6/132696500/pozefipivujoj-dizesarow-kiforemimesuxuk.pdf
    • http://files.singaporenails.com/uploads/1/3/1/4/131453395/e3a3dca2c9f6.pdf
    • http://files.jenkatz-buonincontro.com/uploads/1/3/0/8/130814935/4381266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/zotufenen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/79241335403.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/velekowelupusu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/59920224293.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/82627699395.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8821/files/93565419007.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/gevojoketaboze.pdf
    • https://cdn.shopify.com/s/files/1/0429/0566/5703/files/gavuvavaxukobibefa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/10342639295.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/tatutoxobanolinufelitolif.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/89924954584.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/58680787582.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/miriramesojokafedodowoz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000945b.bin
defe7d678a98b7c2fcedb87db3006d4330bfdfc92eef58496709db864db106bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x945B 4772 bytes
font_01_sfnt_off0000a49f.bin
63763fc0d5b28b30b8c597d90b5c7fcde4d645c92cdfa8e7482eb7813bccde93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49F 10272 bytes

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