Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa6bcc77482c6f1…

MALICIOUS

PDF

47.3 KB Created: 2020-08-08 20:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9083bfcbd2011cd483f1a7382346d097 SHA-1: 144419e6051171c8314fa817d0d02191d51b0eb4 SHA-256: 6aa6bcc77482c6f16f0ac915c8c51df766c9c6a327f1065a548cc8d3842edc7f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and heuristic rules. It contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though partially corrupted, contains a URL that appears to be part of this link farm, suggesting an attempt to drive traffic to potentially harmful 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=subtracting+fractions+worksheets+with+answers+pdf
    • http://files.youroasis4health.com/uploads/1/3/0/8/130814066/c3446e7742.pdf
    • http://files.paperboyproductions.net/uploads/1/3/1/4/131437683/bakakevi.pdf
    • http://files.dennispaulus.com/uploads/1/3/2/6/132682039/6230400.pdf
    • http://files.reginamoessmerdesign.com/uploads/1/3/0/7/130776449/dutarina-nefaloxenip-xuwefizakaxuxel-vomosesebipek.pdf
    • http://files.litezone.ca/uploads/1/3/1/8/131871501/2220265.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/sizibilukawezuvevibiwasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8136/files/gelunow.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/tafejuxofalolikif.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5164/files/wilutukowiminakomofumub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/3570923697.pdf
    • https://cdn.shopify.com/s/files/1/0437/1021/8391/files/vekibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/witurujawupadifer.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/bebigem.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/55372774555.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2560/files/sigugo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/45442229073.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2111/files/gewalowovisilude.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/wisutunerepipometazoveduv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cbf.bin
7a1b03bbf44987ec05dab7ef8f9d9108e1a6951e475afc949b0dd8f993a99f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBF 5664 bytes
font_01_sfnt_off00008002.bin
80341be476883eef0952a5d0c62149f7da35dcc7983434bb2e811c100141292d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 9864 bytes
font_02_sfnt_off0000a1c4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C4 4324 bytes

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