Malicious PDF — malware analysis report

Static analysis result for SHA-256 1750922e37790ec3…

MALICIOUS

PDF

50.6 KB Created: 2020-08-27 16:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93b56399b7651576075baa7d66653dea SHA-1: 5d0f1f1b07321f7b74567ccd04a8adfa4b1b538b SHA-256: 1750922e37790ec36f1cd1db12435ba9fc5b2d1172ce30e6b33dee3c2945f34f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning. The document body, though heavily obfuscated, contains the malicious URL, indicating a likely phishing or malware distribution attempt.

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.ru/pify?keyword=castle+wars+air+balloon+guide
    • http://seluzo.genawave.com/uploads/1/3/1/3/131398177/detanu_kavawape_zopenuri.pdf
    • http://dituza.morphoacoustics.org/uploads/1/3/1/3/131380005/a4e3fcbaa0d.pdf
    • http://files.ackermanheatingandairconditioning.com/uploads/1/3/2/7/132740951/45d2c91b43c75.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/xforce_keygen_coreldraw_x7_kuyhaa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7605/files/84466595985.pdf
    • https://cdn.shopify.com/s/files/1/0437/3905/4231/files/tepazogimofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/native_american_cultures_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0463/1943/5936/files/valley_of_the_yetis.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/baxokodaluvopade.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7650/files/69352330591.pdf
    • https://cdn.shopify.com/s/files/1/0433/4711/6185/files/pawenakeje.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/accidente_de_trabajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/2555262162.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/72751253214.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/16201000721.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/migration_certificate_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/9947217918.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_off00007fa1.bin
6130d1de157541a01a4b16bfb02b8c059577a02dc84772eb59624c42821ee4d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA1 5128 bytes
font_01_sfnt_off00009123.bin
2c8362dec441a5ffa335d5ea79c5ce9cca3849640c396772bfe7055517d2cc54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9123 14076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.