Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a264db208a43c4…

MALICIOUS

PDF

79.3 KB Created: 2020-08-25 04:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2868baa32cfc32b380cacb725e2eef8e SHA-1: 390ca9df50e003f74fd42e4cea9e25cfd18fd1f7 SHA-256: 52a264db208a43c4f338d43450bc58b2243395b95305a88b4585578ba8fa1164
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the document's primary purpose is to redirect users to potentially harmful 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.cc/pify?keyword=sekiro+long+arm+centipede+giraffe+guide
    • http://vupaxefed.legacyministries.info/uploads/1/3/1/4/131483245/7674.pdf
    • http://zemepo.kyocreations.com/uploads/1/3/1/8/131856214/zudumazesagib.pdf
    • http://lawufu.shadowcreekchoir.com/uploads/1/3/1/3/131381762/056378c.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/dudikowogive.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/kuladevalogalapeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3350/files/26068935076.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/grey_chinchompa_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0437/4642/7034/files/noziligugetibotepejaget.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/jikuzetadekomo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/rufijuwefapitevebago.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/retipupobugonaxovexet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3504/0664/files/54856054658.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/47951924601.pdf
    • https://cdn.shopify.com/s/files/1/0451/6613/3397/files/conjunction_words_examples.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_off0000f959.bin
e2759f6e8408ed56f349378ebb2471034c5817f9a48a8b684523341a0b3ec604
pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 5464 bytes
font_01_sfnt_off00010bd1.bin
f1fba653a5b842769c2ff06654d04a7d390ac03c8d4944b526f9e6703dfccebe
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 10604 bytes