Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d4bc8bac2d30ab…

MALICIOUS

PDF

84.7 KB Created: 2020-08-11 13:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e465d3995ea17485e2e68ff5bee3b09 SHA-1: 486ca1f7c2feedb07115f6144242b5358e4027d8 SHA-256: 06d4bc8bac2d30abd10467a995b89e7dcb2e5d1369361867ccf936442c9ab393
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a link farm, suggesting an attempt to distribute malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=atharvashirsha+lyrics+in+sanskrit+pdf
    • http://xojotefel.micahblackarts.com/uploads/1/3/0/8/130813533/nowokutumufizow.pdf
    • http://ronetevi.lingsgardenstore.com/uploads/1/3/1/4/131452861/3335259.pdf
    • http://files.storytimewithteta.ca/uploads/1/3/0/8/130874338/ba62b7.pdf
    • http://files.closets-now.com/uploads/1/3/0/7/130775145/2086150.pdf
    • http://files.michaelnewmannovelist.com/uploads/1/3/0/9/130969768/gikejarenoxesowil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/89326408040.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7345/files/affective_domain_of_learning.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/83635355143.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/suffolk_county_civil_service.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/puremipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/95613668468.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/nukaxuxefarizonorazufa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0579/6774/files/19229988962.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/arduino_mega_adk_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/16861162882.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b747.bin
7aa5d9dd9756c8eda312b7ec5052d37293d3d79c77617ac80d9fbe1d8ac96fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB747 5460 bytes
font_01_sfnt_off0000c9d6.bin
9389eabb5da0f7ff5893e499ff791b47d46466a46589dcf6e6727fbd9e34bd63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D6 3772 bytes
font_02_sfnt_off0000d57c.bin
f5f4e16e52b2829b37ecb7657a05fefda57ac1d5f4b0e93c942e45248738d8b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD57C 14620 bytes
font_03_sfnt_off000102ca.bin
44237c2bd29bae27ea57023a0709260080c5031249aa0a7470225b34c4e38516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 22104 bytes

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