Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2956d077160394b…

MALICIOUS

PDF

45.8 KB Created: 2020-08-03 05:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3a95f85cedc5e72d728d97b48712c11 SHA-1: a834b8dbb61aeeda87362935bde9f6c630d3297a SHA-256: a2956d077160394b20a73d193eaf5a2eb71ba80378b9ed8ae9ca9186dc24003d
152 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=java+static+class'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of multiple PDF links hosted on various domains, including some with unknown reputation, further supports the link farm and redirection attack pattern. No scripts were extracted, limiting the analysis of direct payload execution.

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=java+static+class
    • http://files.challengerlures.com/uploads/1/3/0/7/130739232/loxud.pdf
    • http://files.graciesroom.org/uploads/1/3/0/8/130813818/6355039.pdf
    • http://files.storeroom.norledgemaths.com/uploads/1/3/1/3/131380292/8575597.pdf
    • http://files.techinmeded.com/uploads/1/3/2/7/132712057/kosudenolagel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/nolipaverosorugalafede.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/54333944436.pdf
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/league_of_legends_connection_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1695/files/92510580422.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/resadurarutun.pdf
    • https://cdn.shopify.com/s/files/1/0435/5715/9063/files/56198615205.pdf
    • https://cdn.shopify.com/s/files/1/0429/4941/0979/files/zibojawajagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/63637029063.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/docker_clone_container.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a38.bin
af298bc9ae80ea50bb7e05ff4b768f9640e8754e67e27b3c9b7ec0fc180dcee5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 4200 bytes
font_01_sfnt_off0000786d.bin
87260e51edd550e6bc28cadbffd6ccf1c10233df9bc1cf69eb57e360b520def6
pdf-font-stream PDF embedded font (sfnt) at offset 0x786D 11152 bytes
font_02_sfnt_off00009c9d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9D 4324 bytes