Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abbd357cfa148cc…

MALICIOUS

PDF

45.1 KB Created: 2020-08-25 17:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22522597eb43703f1153200627b39805 SHA-1: 73e72874f669e8c20d964243b73f400254410488 SHA-256: 8abbd357cfa148cceaabe6026513821271e051c42a3ca264cd00821084cbfecf
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=vidmate++mp4+video', which is also listed as a malicious redirector. The presence of a PDF link farm further supports the malicious intent, likely to drive traffic to malicious sites.

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=vidmate++mp4+video
    • http://files.oace.co/uploads/1/3/1/3/131381781/parotakime.pdf
    • http://files.thorndurham.com/uploads/1/3/0/7/130776542/2744369.pdf
    • http://files.crystalsandcreme.com/uploads/1/3/1/3/131380916/7199057.pdf
    • http://files.oace.co/uploads/1/3/1/3/1313
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/68392453879.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/lologikomoja.pdf
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/gaxuvodewotikaben.pdf
    • https://cdn.shopify.com/s/files/1/0465/1198/0694/files/weather_and_climate_crossword_puzzle_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/pibas.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2824/files/39314645530.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/43109298465.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/6491020144.pdf
    • https://cdn.shopify.com/s/files/1/0431/2501/4685/files/nofinoserufem.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/vilezezerexotegod.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/6903757189.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/enthusiasm_verb_forms.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_off000066e4.bin
418df05e29ef332e25dac3d67da92cf633a5b432900235f1d0f9627bd7a86311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 4592 bytes
font_01_sfnt_off0000768c.bin
5108fa0db99935741c5eb63c411a16d9921c6d82d7b005df464a9866d5689312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768C 10192 bytes
font_02_sfnt_off0000997b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x997B 4324 bytes

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